chore: housekeeping — rescue orphaned doc, ignore .DS_Store, adopt vnc-v0.3.0

Commits the offline-client architecture analysis doc that was sitting
untracked in docs/ — its own header already warns this exact thing
happened once before (~/vncmail-plus is a shared checkout; an earlier
untracked copy was lost to a concurrent branch switch). Confirmed the
hazard is still live: vnc/VNC-CHANGES.md itself was found deleted from
disk mid-edit by this session, by something else touching the checkout
concurrently, and had to be restored with `git checkout --` before this
commit. Committing on sight is the only defense against that, not a
process improvement for later.

Also:
- .DS_Store added to .gitignore (was untracked in docs/)
- introduces a VNC-side feature version, separate from package.json's
  upstream-tracking version (1.7.8, must stay that way per the fork's own
  rule 4 - bumping it would turn merging upstream releases into a diffing
  exercise). Retroactively bucketed at the milestone boundaries the commit
  history already has: v0.1.0 fork bootstrap, v0.2.0 S/MIME plugin
  audit+fixes, v0.3.0 the internal-CA foundation just landed. Tagged
  vnc-v0.3.0 on this commit.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.dockerignore

@@ -9,3 +9,8 @@ scripts/
 TODO.md
 *.md
 !README.md
+# Sibling projects / test harness - not part of the webmail image
+examples/
+integration/
+e2e/
+**/node_modules

.env.dev.example

@@ -39,6 +39,16 @@ SETTINGS_SYNC_ENABLED=true
 LOG_FORMAT=text
 LOG_LEVEL=debug
 
+# =============================================================================
+# Plugin Development
+# =============================================================================
+
+# Load plugins from a directory on disk instead of installing them as ZIPs.
+# Each immediate subfolder is one plugin and needs a manifest.json. When the
+# manifest's entrypoint exists under src/, it's bundled on demand with esbuild,
+# so you can edit sources and just refresh the browser.
+# PLUGIN_DEV_DIR=../my-plugins
+
 # =============================================================================
 # Login Page Customization (optional)
 # =============================================================================
@@ -47,3 +57,8 @@ LOG_LEVEL=debug
 # LOGIN_IMPRINT_URL=https://example.com/imprint
 # LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy
 # LOGIN_WEBSITE_URL=https://example.com
+
+# Per-domain branding overrides. Each entry must have "host" (exact or
+# "*.subdomain" wildcard) plus any subset of branding fields to override.
+# Unset fields fall through to the global values above.
+# DOMAIN_BRANDING=[{"host":"localhost","loginCompanyName":"Local Dev"}]

.env.example

@@ -19,6 +19,16 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Access-Control-Allow-Origin header, or browser requests will be blocked.
 # ALLOW_CUSTOM_JMAP_ENDPOINT=true
 
+# Offer several JMAP servers on the login form. JSON array; each entry needs
+# id, label, and url. "domains" and a per-server "oauth" block are optional.
+# Prefer configuring this from the admin dashboard - the env form exists for
+# stateless deployments.
+# JMAP_SERVERS=[{"id":"eu","label":"Europe","url":"https://eu.example.com","domains":["example.com"]},{"id":"us","label":"US","url":"https://us.example.com","oauth":{"clientId":"webmail-us"}}]
+
+# Pick the server automatically from the domain of the address the user types,
+# matching against each entry's "domains" list. Default: false.
+# JMAP_SERVER_AUTO_PICK_BY_DOMAIN=true
+
 # =============================================================================
 # Stalwart Mail Server Integration
 # =============================================================================
@@ -49,6 +59,29 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # OpenID Connect issuer URL for discovery
 # OAUTH_ISSUER_URL=https://your-idp.example.com
 
+# Overrides only the user-facing authorize endpoint (e.g. a per-brand login
+# host). Discovery, token exchange and refresh keep using OAUTH_ISSUER_URL.
+# Leave unset to use the authorization_endpoint from discovery.
+# OAUTH_AUTHORIZE_URL=https://login.your-brand.example.com/application/o/authorize/
+
+# Allow OAuth discovery to resolve to private (RFC-1918 / loopback) addresses.
+# Off by default as an SSRF guard. Enable for split-DNS deployments where the
+# OAuth issuer's public hostname resolves to an internal IP from this server.
+# OAUTH_ALLOW_PRIVATE_ENDPOINTS=true
+
+# Replace the scopes requested at authorization. Space-separated. Leave unset
+# to use the defaults the client already asks for.
+# OAUTH_SCOPES=openid email profile offline_access
+
+# Append scopes instead of replacing them. Use this when your IdP needs one
+# extra scope and you don't want to restate the defaults.
+# OAUTH_EXTRA_SCOPES=groups
+
+# Send the user straight to the identity provider, skipping the login form.
+# Intended for embedded deployments where the parent app already authenticated
+# them. Default: false.
+# AUTO_SSO_ENABLED=true
+
 # =============================================================================
 # Session & Security
 # =============================================================================
@@ -78,12 +111,61 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Admin Dashboard Data
 # =============================================================================
 
-# Directory for admin dashboard state: config overrides, admin password hash,
-# installed plugins/themes, and audit logs (default: ./data/admin).
-# For Docker, the default resolves to /app/data/admin - mount a persistent
-# volume there (see docker-compose.yml).
+# Admin data is split across two directories so the config volume can be
+# mounted read-only after the setup wizard completes (see issue #226).
+#
+# Config dir - operator-authored state. Holds config.json, policy.json,
+# admin.json (passwordHash only), plugin-config/, plugins/, themes/, and
+# branding uploads. Safe to mount read-only after setup.
+# Default: ./data/admin (or ADMIN_DATA_DIR if that legacy variable is set)
+# ADMIN_CONFIG_DIR=./data/admin
+#
+# State dir - runtime mutations. Holds admin-state.json (login timestamps),
+# audit.log, and the bootstrap setup token. Always read-write.
+# Default: ./data/admin-state (or ADMIN_DATA_DIR/state when ADMIN_DATA_DIR
+#          is set, for back-compat with single-volume installs)
+# ADMIN_STATE_DIR=./data/admin-state
+#
+# Set to "true" to enforce read-only mode at the application layer (cleaner
+# error than a mid-request EROFS). Pair with `:ro` on the config-volume mount.
+# ADMIN_CONFIG_READONLY=true
+#
+# Legacy: a single dir containing both config and state. Honoured if neither
+# of the split variables is set. New installs should use the split vars.
 # ADMIN_DATA_DIR=./data/admin
 
+# =============================================================================
+# Anonymous Telemetry
+# =============================================================================
+
+# Anonymous instance telemetry is OPT-IN and disabled by default. Enabling it
+# helps us understand how Bulwark is used so we can make the product better.
+# Heartbeats contain no PII: version, platform, bucketed account counts, and
+# feature toggles only - never email addresses, hostnames, or IPs. See
+# https://bulwarkmail.org/docs/legal/privacy/telemetry for the full schema.
+#
+# Enable telemetry (also toggleable in the admin UI):
+# BULWARK_TELEMETRY=on
+#
+# Setting this (on or off) locks the choice and disables the admin UI toggle.
+
+# Directory for telemetry state: instance id, consent, login HMACs
+# (default: ./data/telemetry). For Docker, the default resolves to
+# /app/data/telemetry - mount a persistent volume there (see docker-compose.yml)
+# so the instance id and consent choice survive upgrades.
+# TELEMETRY_DATA_DIR=./data/telemetry
+
+# Legacy kill switch, honoured only when BULWARK_TELEMETRY is unset.
+# BULWARK_TELEMETRY_DISABLED=1
+
+# Let heartbeats reach a private/loopback address. Off by default as an SSRF
+# guard; only useful when running a collector locally during development.
+# BULWARK_TELEMETRY_ALLOW_PRIVATE=1
+
+# Report a fixed Stalwart version instead of probing the JMAP server's Server
+# header. Useful when a proxy strips that header.
+# STALWART_VERSION=0.16.0
+
 # =============================================================================
 # Server Listen Address
 # =============================================================================
@@ -149,6 +231,12 @@ JMAP_SERVER_URL=https://your-jmap-server.com
 # Should match your app's main background color. Default: #ffffff
 # PWA_BACKGROUND_COLOR=#ffffff
 
+# Screenshots shown in the browser's install prompt. Absolute URLs or paths
+# relative to public/. Both are optional; per-domain overrides are available
+# through DOMAIN_BRANDING.
+# PWA_SCREENSHOT_MOBILE_URL=/branding/screenshot-mobile.png
+# PWA_SCREENSHOT_DESKTOP_URL=/branding/screenshot-desktop.png
+
 # ---------------------------------------------------------------------------
 # Logos
 # ---------------------------------------------------------------------------
@@ -186,14 +274,175 @@ LOGIN_COMPANY_NAME=Bulwark Webmail
 # URL for the company website link on the login page.
 LOGIN_WEBSITE_URL=https://bulwarkmail.org
 
+# Cap the login logo's rendered size. Any CSS length ("120px", "8rem").
+# Unset means the logo renders at its natural size.
+# LOGIN_LOGO_MAX_HEIGHT=96px
+# LOGIN_LOGO_MAX_WIDTH=320px
+
+# Hide parts of the login page. All default to true.
+# Turn the heading and subtitle off when the logo already reads as the brand.
+# LOGIN_SHOW_HEADING=false
+# LOGIN_SHOW_SUBTITLE=false
+#
+# Hide the optional TOTP field. A server that requires TOTP (totp_required)
+# still shows it regardless of this setting.
+# LOGIN_SHOW_TOTP=false
+#
+# Hide the version number, so it isn't disclosed to unauthenticated visitors.
+# LOGIN_SHOW_VERSION=false
+
+# ---------------------------------------------------------------------------
+# Per-domain branding overrides (optional)
+# ---------------------------------------------------------------------------
+#
+# When you serve the webmail on multiple hostnames, each hostname can override
+# a subset of branding fields. Unset fields fall back to the global values
+# above. Match is on the request's Host (or X-Forwarded-Host) header.
+#
+# Use the leftmost label "*." to match any subdomain (e.g. "*.example.com"
+# matches mail.example.com and any deeper subdomain, but NOT example.com).
+# Exact matches always win over wildcards; the longest wildcard suffix wins
+# among multiple wildcard matches.
+#
+# Overridable keys: appName, appShortName, appDescription, faviconUrl,
+# pwaIconUrl, pwaThemeColor, pwaBackgroundColor, appLogoLightUrl,
+# appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName,
+# loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl.
+#
+# Prefer setting this from the admin dashboard (PATCH /api/admin/config).
+# The env-var form is provided for stateless deployments.
+#
+# DOMAIN_BRANDING=[{"host":"maildomain1.com","loginCompanyName":"Company One","loginLogoLightUrl":"/branding/one-color.svg","loginLogoDarkUrl":"/branding/one-white.svg","loginWebsiteUrl":"https://one.example"},{"host":"maildomain2.com","loginCompanyName":"Company Two","faviconUrl":"/branding/two-favicon.svg"},{"host":"*.intranet.example.com","loginCompanyName":"Internal"}]
+
 # =============================================================================
 # Extension Directory / Marketplace
 # =============================================================================
 
 # URL of the BulwarkMail extension directory for the admin marketplace.
-# Set this to enable browsing and installing plugins/themes from the directory.
+# Defaults to https://extensions.bulwarkmail.org. Override only if you run
+# your own directory (e.g. http://localhost:3001 for local development).
 # EXTENSION_DIRECTORY_URL=https://extensions.bulwarkmail.org
 
+# =============================================================================
+# Admin Dashboard Access
+# =============================================================================
+
+# Bootstrap password for the admin dashboard. Read only when admin.json does
+# not already exist; the app hashes it, writes admin.json, and logs a warning
+# telling you to remove this variable. Without it (and without the setup
+# wizard) the admin dashboard stays disabled.
+# Accepts a plaintext password or an existing hash.
+# ADMIN_PASSWORD=change-me
+
+# Admin session lifetime in seconds. Default: 3600 (1 hour).
+# ADMIN_SESSION_TTL=3600
+
+# How many trusted reverse proxies sit in front of the app. The client IP is
+# taken that many entries from the right of X-Forwarded-For, so an attacker
+# can't spoof it by prepending values. Default: 1.
+# TRUSTED_PROXY_DEPTH=2
+
+# Allow search engines to index the app (robots.txt / noindex). Default: false.
+# SEARCH_ENGINE_INDEXING=true
+
+# =============================================================================
+# Cookies, Embedding & Reverse Proxies
+# =============================================================================
+
+# SameSite attribute for session cookies: lax (default), strict, or none.
+# Embedding the app cross-origin in an iframe requires "none".
+# COOKIE_SAME_SITE=none
+
+# Force the Secure flag on cookies. Defaults to on when NODE_ENV=production or
+# COOKIE_SAME_SITE=none. Set to false only for local HTTP development.
+# COOKIE_SECURE=false
+
+# Who may frame the app, as a CSP frame-ancestors value. Defaults to 'none',
+# which blocks all framing. Space-separate multiple origins.
+# ALLOWED_FRAME_ANCESTORS=https://portal.example.com
+
+# Origin of the parent page when embedded, used for postMessage handshakes.
+# NEXT_PUBLIC_PARENT_ORIGIN=https://portal.example.com
+
+# =============================================================================
+# Update Check
+# =============================================================================
+
+# The app periodically checks for new releases and shows a notice. Set to
+# "off" (or false/0/no) to disable the check entirely.
+# BULWARK_UPDATE_CHECK=off
+
+# Override the endpoint it checks. Takes priority over the on-disk state file.
+# An explicit empty value also disables the check.
+# BULWARK_UPDATE_CHECK_URL=https://updates.example.com/bulwark.json
+
+# Where the check stores its state. Default: ./data/version-check
+# VERSION_CHECK_DATA_DIR=./data/version-check
+
+# =============================================================================
+# Translation Proxy (optional)
+# =============================================================================
+
+# /api/translate defaults to the public MyMemory API, which needs no setup.
+# Point it at a LibreTranslate instance instead to keep message text on
+# infrastructure you control. LibreTranslate also auto-detects the source
+# language natively.
+# LIBRETRANSLATE_URL=https://libretranslate.example.com
+# LIBRETRANSLATE_API_KEY=
+
+# =============================================================================
+# Web Push
+# =============================================================================
+
+# Push notifications go through a hosted relay so self-hosters don't need
+# their own VAPID keys and Firebase project. Point this at your own relay to
+# avoid the default. Build-time variable.
+# Default: https://notifications.relay.bulwarkmail.org
+# NEXT_PUBLIC_PUSH_RELAY_URL=https://push.example.com
+
+# =============================================================================
+# Demo Mode
+# =============================================================================
+
+# Serve fixture data instead of talking to a mail server. Default: false.
+# DEMO_MODE=true
+
+# =============================================================================
+# Stalwart Impersonation (advanced)
+# =============================================================================
+
+# Lets a trusted platform mint a JWT that logs a user in without their
+# password, using a Stalwart master account. Intended for embedded
+# deployments where an outer platform already authenticated the user.
+#
+# SECURITY: this grants sign-in as any mailbox on the server. The endpoint
+# returns 404 unless all three required variables below are set, so leaving
+# them unset keeps the feature fully off. Treat the secret and the master
+# password as you would a root credential.
+#
+# BULWARK_JWT_AUTH_SECRET=            # required, >= 32 characters
+# BULWARK_STALWART_MASTER_USER=       # required, e.g. master@example.com
+# BULWARK_STALWART_MASTER_PASSWORD=   # required
+# BULWARK_JWT_AUTH_ISSUER=            # optional, default "platform-api/webmail"
+
+# =============================================================================
+# Internationalization
+# =============================================================================
+# These are build-time variables - to change them with the published Docker
+# image, rebuild it with --build-arg (see README "Default UI locale").
+#
+# Fallback UI locale used when the visitor's Accept-Language header does not
+# match any supported locale. Defaults to "en".
+# Supported: ar, ca, cs, da, de, en, es, fa, fr, he, hu, it, ja, ko, lv, nl, pl,
+#            pt, ro, ru, sk, tr, uk, zh
+# An unsupported value falls back to "en".
+# NEXT_PUBLIC_DEFAULT_LOCALE=tr
+
+# Locale prefix mode for URLs. Recommended "always" when proxying under a
+# subpath (NEXT_PUBLIC_BASE_PATH) to avoid next-intl rewrite loops.
+# Values: never (default) | always | as-needed
+# NEXT_PUBLIC_LOCALE_PREFIX=always
+
 # =============================================================================
 # Legacy Build-time Variables (still supported as fallback)
 # =============================================================================

.github/workflows/docker-publish-releases.yml

@@ -50,6 +50,8 @@ jobs:
           context: .
           platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
           outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
           cache-from: type=gha,scope=${{ matrix.platform }}
           cache-to: type=gha,mode=max,scope=${{ matrix.platform }}
@@ -116,3 +118,114 @@ jobs:
       - name: Inspect image
         run: |
           docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}
+
+  build-always:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            runner: ubuntu-24.04-arm
+    runs-on: ${{ matrix.runner }}
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
+            NEXT_PUBLIC_LOCALE_PREFIX=always
+          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=always-${{ matrix.platform }}
+          cache-to: type=gha,mode=max,scope=always-${{ matrix.platform }}
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests-always
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests-always/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-always-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
+          path: /tmp/digests-always/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge-always:
+    runs-on: ubuntu-latest
+    needs: build-always
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests-always
+          pattern: digests-always-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          flavor: |
+            suffix=-always,onlatest=true
+          tags: |
+            type=raw,value=latest
+            type=semver,pattern=v{{version}}
+            type=semver,pattern={{version}}
+            type=semver,pattern=v{{major}}.{{minor}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern=v{{major}}
+            type=semver,pattern={{major}}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests-always
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}

.github/workflows/docker-publish.yml

@@ -78,6 +78,8 @@ jobs:
           context: .
           platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            GIT_COMMIT=${{ github.sha }}
           outputs: type=image,name=${{ needs.prepare.outputs.image_name }},push-by-digest=true,name-canonical=true,push=true
           cache-from: type=gha,scope=${{ matrix.platform }}
           cache-to: type=gha,mode=max,scope=${{ matrix.platform }}

.gitignore

@@ -49,4 +49,15 @@ next-env.d.ts
 /local-data/
 
 # Sibling repos
-/repos/
+/repos/
+
+# k8s deploy secret (create from deploy/k8s/secret.example.yaml)
+/deploy/k8s/secret.yaml
+
+# S/MIME plugin build output (rebuild with: cd vnc/plugins/smime && npm run build)
+vnc/plugins/smime/node_modules/
+vnc/plugins/smime/dist/
+vnc/plugins/smime/smime-vnc.zip
+
+# macOS
+.DS_Store

CHANGELOG.md

@@ -1,11 +1,719 @@
 # Changelog
 
+## 1.7.8 (2026-07-22)
+
+### Features
+
+- **Unified Mailbox**: Account-bounded Unified Mailbox with opt-in cross-account aggregation (#509)
+- **Unified Mailbox**: Search in the unified views
+- **Unified Mailbox**: Live unified/All-Mail counters for shared and group accounts
+- **Mail**: Message-list category tabs
+- **Mail**: Drag-and-drop reorder for all folders
+- **Mail**: Collapse quoted reply text behind a "..." toggle (#480)
+- **Mail**: Bulk Not-Spam action in the junk selection toolbar
+- **Mail**: Unread count badge on the favicon
+- **Mail**: Message spacing setting (auto/always/edge-to-edge)
+- **Mail**: Open external links in a new tab (safely)
+- **Mail**: Strip external `url()`/`@import` from `<style>` blocks in the sanitizer (#457)
+- **Composer**: Text color picker in the composer toolbar
+- **Composer**: Contact groups as single expandable recipient chips
+- **Composer**: Drag-to-reorder To/Cc/Bcc recipient chips (#593)
+- **Composer**: Auto-detect paragraph text direction by default
+- **Templates**: HTML template support
+- **Vacation**: HTML body support in the vacation responder
+- **Send**: 'Send now' action on the send-delay toast
+- **Accounts**: Remove a specific account from the switcher
+- **Settings**: "Refresh cached data" recovery action
+- **i18n**: Full Arabic (ar) translation with RTL support
+- **Login**: `LOGIN_SHOW_TOTP` and `LOGIN_SHOW_VERSION` config flags (#520)
+- **Docker**: `NEXT_PUBLIC_LOCALE_PREFIX` build argument
+- **Plugins**: `ui.rerenderFetchedEmails` method (#668)
+- **Plugins**: `onEmailsFetched` and `onSearchResults` hooks and `getSomeEmails` JMAP method
+- **Plugins**: `onRecipientChipsChange` hook
+- **Plugins**: `webauthn.getOrCreate` API method
+- **Plugins**: Download files generated by a plugin (with `ui:download-file` consent permission)
+- **Plugins**: Submit mail without moving to a mailbox and import-to-mailbox APIs
+
+### Fixes
+
+- **Mail**: Render the email body on DOM parse instead of iframe load (#635)
+- **Mail**: Keep sidebar tag counts in step with read/unread changes
+- **Mail**: Enable thread expansion in the focused list
+- **Mail**: Show the quote bar in email replies
+- **Mail**: Honor part-type fallback when quoting replies (#649)
+- **Mail**: Detect typing inside the quoted-HTML shadow island (#654)
+- **Mail**: Keep `target`/`rel` on links in plain-text message bodies and open signature links in a new tab
+- **Accounts**: Eliminate the full-screen flash when switching accounts (including cached accounts)
+- **Accounts**: Recognize canonicalized login usernames in the account-switch guard
+- **Auth**: Guard account switch against slot→token desync and basic-auth identity mismatches
+- **Auth**: End refresh loops on sign-out and back off failed retries
+- **OAuth**: Harden OIDC discovery (timeout, retry, serve-stale)
+- **JMAP**: Preserve POST across redirects in the Stalwart JMAP passthrough (#627)
+- **JMAP**: File the post-send message with a full `mailboxIds` replacement
+- **JMAP**: Generate the Message-ID client-side using the sender's domain
+- **Identity**: Sync the default sender identity per account (#507)
+- **Attachments**: Download/view attachments on cross-account All-Mail messages
+- **Shared folders**: Route batch actions to the owner account
+- **Templates**: Insert a mail template at the caret in replies instead of prepending (#539)
+- **Templates**: Keep the signature when inserting a template (#621)
+- **Templates**: Hide template buttons when templates are disabled
+- **Calendar**: Honor "Show time in month view" on mobile instead of forcing dots (#666)
+- **Calendar**: Classify self-organized imported events as editable
+- **Contacts**: Assign a UID to contact cards on creation (#644)
+- **Spam**: Stop HELO `spf=none` from downgrading a MAIL FROM `spf=pass` (#650)
+- **Drafts**: Label the close-dialog draft button with the generic Save
+- **RTL**: Flip JS-positioned popovers and anchor floating menus with logical start/end
+- **RTL**: Isolate Latin address text from RTL bidi reordering and force LTR identity options
+- **i18n**: Register Arabic messages in the client IntlProvider
+- **i18n**: Fix the Hebrew Drafts folder label
+- **i18n**: Add missing translation keys across 22 locales
+- **Deps**: Bump `dompurify` to 3.4.12 and `next-intl` to 4.13.3
+
+## 1.7.7 (2026-07-09)
+
+### Features
+
+- **Plugins**: `ui.rerenderEmail` API and restyled read-receipt banner
+- **Plugins**: New hooks — `onBeforeBlobUpload`, `onBeforeDraftAutoSave`, `onBeforeEditDraft` (#586)
+- **Plugins**: `ui.prompt` dialog and first-class settings-section tabs
+- **Calendar**: Jalali (Persian/Shamsi) calendar support with Saturday as week start (#490)
+- **i18n**: Hebrew locale with full RTL support
+- **i18n**: Slovak translation
+- **i18n**: User-selectable regional date format
+- **Contacts**: Enable trusted-senders address book sync by default when contacts are available
+- **Mail**: Pin emails to the top of the folder list
+- **Mail**: Setting to disable the tag-color row tint in the message list
+- **Mail**: Click the sender avatar to select a message/thread (Thunderbird-style)
+- **Accounts**: Pin the default account on top and drag-to-reorder the account switcher
+- **Composer**: Recipient autocomplete from Sent, with on-demand server search
+- **Composer**: Preselect the identity of the active mailbox for new messages
+- **Email**: Send a quick reply with Ctrl/Cmd+Enter
+- **Headers**: Parse Stalwart spam headers
+- **Login**: Configurable logo size and hideable heading/subtitle
+- **PWA**: Apple Touch icons for the iOS home screen
+
+### Fixes
+
+- **Mail**: Hide Files when the account lacks the filenode capability (#563)
+- **Mail**: Keep advanced search filters applied when switching folders (#553)
+- **Mail**: Keep the email list scrollable when the bottom reading pane is enabled with no conversation selected
+- **Mail**: Route keyword writes to the email's own account in unified view
+- **Mail**: Render emails that set `height:100%` on a wrapper element
+- **Mail**: Hide images that fail to load
+- **Mail**: Storage quota not shown with Stalwart (#577)
+- **Spam**: Hide the spam action in Sent, Drafts and Scheduled
+- **Spam**: Fix stale folder counters and open message after spam actions
+- **Composer**: Wait for in-flight attachment uploads before sending
+- **Composer**: Only commit a recipient on Space when the input is a valid email (#571)
+- **Composer**: Attachment reminder now ignores quoted text on reply/forward (#570)
+- **Calendar**: Store the event organizer as owner-only to prevent duplicate ORGANIZER/ATTENDEE
+- **Calendar**: Strike through cancelled events and mute their reminders (#572)
+- **Calendar**: Use `calendarAddress`/`organizerCalendarAddress` for scheduling, drop retired `sendTo`/`replyTo` (#500)
+- **Auth**: Keep the session when the auth server is briefly unreachable
+- **Shortcuts**: Make keyboard shortcuts layout-agnostic and map by physical position
+- **Shortcuts**: Don't toggle mailbox subfolders on Arrow keys while typing
+- **Contacts**: Clear the photo on the server by sending `media: null` when removed
+- **Plugins**: Preserve the settings slot and privileged tier
+- **Pro**: Prompt to save or discard a draft when closing a compose tab via the tab-bar X
+- **Pro**: Show the Edit button on draft emails opened in a new tab
+- **List**: Shift-click on the checkbox extends the selection (range)
+- **CSP**: Allow external/data fonts so email webfonts render
+- **Notifications**: Brand push notifications with the configured PWA icon
+- **Notifications**: Notification sound preview — base-path prefix and longer default beep
+- **Unsubscribe**: Send `mailto:` unsubscribe ourselves instead of via the OS handler
+- **Branding**: Apply per-domain favicon override in root metadata (#585)
+- **Settings**: Load the trusted-senders address book on the settings page so the count isn't 0
+- **Setup**: Clone source when `setup.sh` runs detached from a checkout (#518)
+- **Server**: Use a callable `.get` to detect `Headers` in `pickRequestHost`
+
+## 1.7.6 (2026-06-28)
+
+### Breaking Changes
+
+- **S/MIME**: The built-in S/MIME implementation has been removed from core and re-delivered through the new generic crypto plugin hooks (privileged same-origin plugin tier). S/MIME signing, encryption, decryption, certificate management, and the related settings UI now live in a plugin rather than the main app. Deployments that relied on built-in S/MIME must install the S/MIME crypto plugin to retain those features.
+
+### Features
+
+- **Plugins**: Privileged same-origin plugin tier with a crypto API surface
+- **Plugins**: Plugin hooks for email details, headers, and source
+- **Mail**: Option to hide the total message count on folders (#498)
+
+### Fixes
+
+- **Mail**: Hide the server scheduled folder when the virtual one is shown (#495)
+- **Mail**: Stop the unified mailbox from mutating client-returned email objects
+- **Composer**: HTML-escape sender and subject in the reply/forward quote header (#482)
+- **Calendar**: Send calendar invites by setting `organizerCalendarAddress`
+- **Identity**: Sync the default identity (`preferredPrimaryId`) to server settings (#507)
+- **Auth**: Support MFA login via the structured auth endpoint
+- **Admin**: Show all built-in themes in the admin theme controls (#496)
+- **i18n**: Add missing translation keys across 19 locales
+
+## 1.7.5 (2026-06-24)
+
+### Features
+
+- **Mail**: Cross-account "All accounts" views with full group/shared-account support
+- **Mail**: Per-account "All Mail" folder selection
+- **Mail**: "Download all" button to bundle attachments into a zip (#466)
+- **Mail**: Return to the list after deleting or marking the open message unread — configurable (default on)
+- **Mail**: Collapse-all-threads action in thread-list selection
+- **Calendar**: Option to disable the calendar
+- **Composer**: Send-now button on scheduled/delayed messages
+- **Composer**: Email a contact or group via the in-app composer
+- **Composer**: Split a pasted address list into recipient chips
+- **Contacts**: "New address book" creation UI (#415)
+- **OAuth**: `OAUTH_AUTHORIZE_URL` to override the authorize endpoint
+- **i18n**: Farsi (fa) locale — complete (2654 strings)
+- **i18n**: Romanian (ro) locale
+
+### Fixes
+
+- **Composer**: Keep HTML signature styling in the editor and on send
+- **Composer**: Guard Send against double-submit
+- **Composer**: Strip display names from the `EmailSubmission` envelope addresses
+- **Calendar**: Disable iMIP scheduling on calendar import (#411)
+- **Mail**: Localize special-folder names by JMAP role (#404)
+- **Mail**: Block remaining email tracking vectors (#457)
+- **Mail**: Route counter and unread updates to the email's own account in aggregate views
+- **Mail**: Fix blank space in plain-text emails
+- **Mail**: Fix toolbar re-render when opening emails
+- **Mail**: Truncate long subjects so they don't overlap the timestamp
+- **Mail**: Strip reply/forward prefixes followed by a full-width colon
+- **Mail**: Add breathing room between the unread dot and the avatar
+- **Mail**: Isolate per-account state snapshots from leakage and mutation
+- **Mail**: Cap filename tokens at the full 200-char limit
+- **Spam**: Fetch mailboxes with `accountId` in `markAsSpam`
+- **Filters**: Load mailboxes when opened directly (#485)
+- **Settings**: Surface server errors on password change and TOTP toggle
+- **Send now**: Gate the toolbar label and translate `send_now` across locales
+- **Directory**: Fix fetching display names
+- **Push**: Reap only relay-confirmed-dead leftover subscriptions
+- **i18n**: Add the missing fa locale to the client `IntlProvider` messages map
+- **i18n**: Add missing translation keys across 19 locales
+
+## 1.7.4 (2026-06-15)
+
+### Features
+
+- **Mail**: New "All Mail" view across folders and accounts
+- **Mail**: Edit contact directly from the email viewer contact sidebar
+- **Calendar**: Recurrence editor, set-default calendar, and timezone-aware calendar queries
+- **Calendar**: Agenda plugin sidecar
+- **Composer**: Email display name support
+- **Composer**: Drag-and-drop recipient chips between To/CC/BCC fields, with the address shown in the drag preview
+- **Composer**: Avatars in recipient autocomplete suggestions, including directory users
+- **Files**: JMAP file/folder sharing in the Files app (#408)
+- **Auth**: QR-code SSO login and device pairing between webmail and the mobile app
+- **Auth**: Require re-authentication for device pairing and SSO
+- **Accounts**: Manage shared/group account settings from the Accounts page
+- **Setup**: Opt-in telemetry in the web setup wizard
+- **Mail**: Persist the email detail sidebar state
+
+### Fixes
+
+- **Mail**: Preserve line breaks in the generated `text/plain` alternative (#421)
+- **Mail**: Fix inconsistent threading of email messages in the inbox and folders
+- **Mail**: Stop draft emails from being marked as unread
+- **Mail**: Prevent wide email tables from rendering with rotated headers (#409)
+- **Mail**: Preserve the folder list when a mailbox refetch hits the concurrent-request limit
+- **Mail**: Correct dark-mode background-image inversion and height clipping in the email viewer
+- **Calendar**: Dedupe scheduling emails and use Stalwart-compatible calendar filters
+- **Calendar**: Redesign the custom recurrence editor to match the modal UI
+- **Files**: Don't send the connected-account key as the JMAP `accountId` when sharing files (#408)
+- **Routing**: Strip the build-time `basePath` from `router.push` redirects after login (#390)
+- **Nav**: Open recent contact emails at `/` instead of 404ing on `/mail`
+- **Nav**: Hide the Add App button when `sidebarAppsEnabled` is false
+- **Settings**: Move the "Plain Text Only" setting from Reading to Composing (#422)
+- **Privacy**: Make telemetry opt-in
+- **UI**: Fix the context menu being invisible on first right-click after page load
+- **Admin**: Remove the JMAP status from the admin dashboard
+- **i18n**: Add missing translation keys across 17 locales
+
+## 1.7.3 (2026-06-04)
+
+### Features
+
+- **Mail**: Inline attachment preview — reliable MIME detection with inline PDF on desktop and mobile
+- **Mail**: Preview composer attachments inline (click to open)
+- **Mail**: Preview `.eml` (`message/rfc822`) attachments like an email
+- **Mail**: Read receipts (MDN, RFC 8098)
+- **Mail**: Editable, layout-preserving quote island when replying
+- **Mail**: Surface the most severe SPF result and hide the "via" badge on spoofed mail
+- **Calendar**: Per-viewer colors for shared calendars (#345)
+- **Filters**: Extended filter rules — attachment field and multi-value conditions
+- **Settings**: New built-in themes — Aurora Glass and Elastic
+- **Settings**: Theme cards render as a mini mailbox mockup from theme colors, with light/dark variant chips
+- **Plugins**: Localizable sandboxed plugins (manifest locales + `api.i18n.t`)
+- **Plugins**: `/api/translate` proxy and email body exposed to plugins
+- **Admin**: Toggle for search-engine indexing (robots)
+- **Admin**: `passwordHashFile` in `admin.json`
+- **Admin**: `sessionSecretFile` and `oauthClientSecretFile` for file-based secrets in JSON config
+- **PWA**: Configurable install screenshots (per-domain)
+- **i18n**: Hungarian locale support
+
+### Fixes
+
+- **Files**: Store Files as real `FileNode` hierarchy, migrate legacy flat-named files on load, and list folders via `FileNode/get` so they are visible (#379)
+- **Files**: Treat a blob-less `FileNode` as the only folder signal and migrate legacy dir-markers
+- **Mail**: Empty Trash for shared and group folders (#387)
+- **Mail**: Move mail from a shared group inbox to a personal inbox (#375)
+- **Mail**: Preserve the HTML signature when sending a quick reply
+- **Mail**: Stop body clipping under the fold when the email sets `html`/`body` `height: 100%`
+- **Mail**: Drop single-letter `R:`/`I:` subject prefix tokens and deduplicate localized reply/forward prefixes
+- **Mail**: No more 404 console spam for missing sender favicons
+- **Auth**: Discover OIDC metadata server-side to avoid CORS failures (#382)
+- **Send**: Route the Sent copy to the shared-mailbox account on per-identity send
+- **Routing**: Honour `basePath` in the plugin sandbox, `http.post` proxy, and branding
+- **i18n**: Localize the PWA install prompt, reply/forward quote header (incl. sender address), `<html lang>`, and per-locale `<head>` description; add missing `settings.folders.role_memos` key
+- **Themes**: Plugin slot iframes inherit host font and color tokens
+- **Theme**: Gate preview "open in new tab" on inline-safe MIME types
+- **Appearance**: Move Themes settings into the Appearance category with a distinct tab icon; clicking the active theme is a no-op
+- **UI**: Fix invisible dark-mode borders (border token collided with secondary)
+- **UI**: Remove the 16px empty strip beside the collapsed sidebar
+- **UI**: Align top bars to a uniform `h-14` height and the account selector header to the search/reply toolbars
+- **UI**: Close pane gaps by centering the resize handle on the seam
+- **Settings**: Fix section gears permanently hijacking the active tab
+
+## 1.7.2 (2026-05-28)
+
+### Features
+
+- **Mail**: Scheduled send and send delay (#322)
+- **Mail**: Drag emails out to the file explorer as `.eml`
+- **Mail**: Import emails from `.zip` archives
+- **Mail**: "Move to Trash and mark as read" delete action (#323)
+- **Mail**: Include group inboxes in the unified mailbox view (#328)
+- **Mail**: Locale-aware date format in the email list with a preset picker (#331)
+- **Mail**: Allow drag-and-drop into shared mailboxes
+- **Composer**: Ctrl/Cmd+Enter sends the open draft
+- **Settings**: New Downloads tab with template editor for `.eml` and attachment filenames
+- **Settings**: Filename transform settings and an ASCII-only "date (from-to) subject" template
+- **Settings**: Post-export action (keep / archive / trash)
+- **Settings**: Template for multi-email `.zip` filenames
+- **Admin**: Per-domain branding editor with overrides on `/api/config`, manifest, and PWA icon (#332)
+- **Admin**: Policy-controlled push relay URL with optional user lock
+- **i18n**: `NEXT_PUBLIC_DEFAULT_LOCALE` for fallback UI locale (#243)
+
+### Fixes
+
+- **Mail**: Editable HTML signature in new mail; clean state on every compose entry (#329)
+- **Mail**: Report real upload progress with XHR progress events (#333)
+- **Mail**: Restore `blob:` in `object-src` and `frame-src` CSP for PDF/HTML previews
+- **Mail**: Match user-avatar treatment on quick reply
+- **Email viewer**: Stop shattering table cells with `word-break: break-word`
+- **Composer**: Scope Ctrl/Cmd+Enter send to the focused composer
+- **Composer**: Stop closing the form when editing any field
+- **Pro**: Keep the empty viewer pane visible in the split layout
+- **Pro**: Prevent an empty main pane when reordering tabs across panes
+- **Mobile**: Collapse focus mail layout to multi-line
+- **Mobile**: Keep a gutter on bare-HTML and plain-text emails
+- **Calendar**: Align continued multi-week events with the week's left edge
+- **Calendar**: Show the end date in the event popover for multi-day events (#318)
+- **Calendar**: Convert `recurrenceRules` to singular in batch create
+- **Calendar**: Handle malformed event dates (#316)
+- **Files**: Stop URL-encoding drag-out filenames and preserve Unicode letters
+- **Routing**: Prefix remaining `<img>`, favicon, and WebDAV URLs with `basePath` (#319)
+- **Routing**: Prefix hand-written URLs with `basePath` for subpath deployments
+- **Auth**: `OAUTH_ALLOW_PRIVATE_ENDPOINTS` for split-DNS setups
+
+### i18n
+
+- Add missing translation keys across 16 locales
+
+## 1.7.1 (2026-05-22)
+
+### Features
+
+- **Admin**: Expose PWA branding fields in the admin Branding tab
+- **Pro**: Hide empty-state placeholder and collapse the viewer pane in Pro mode so the mail list fills the space
+
+### Fixes
+
+- **Mail**: Preserve inline images when replying (#163)
+- **Filters**: Use the canonical `INBOX` mailbox in Sieve filter paths (#313)
+- **Mail**: Resolve destination account id to the local namespace on cross-account mailbox drop
+
+## 1.7.0 (2026-05-21)
+
+> **New: Pro mode (experimental).** Opt-in tabbed multi-pane interface for power users. Open multiple mail, calendar, contacts, and file views side-by-side, drag tabs to reorder or split panes at the edges, and work across all logged-in accounts in one shell - cross-account email moves, a unified inbox with search, account-split calendar/contacts/files sidebars, and a per-account "From" dropdown in the composer. Enable from Settings → Appearance; the `proInterface` preference is per-device and not synced.
+
+### Breaking Changes
+
+- **Plugins**: Plugins now run inside a null-origin iframe sandbox and talk to the host over a postMessage RPC bridge. The in-process plugin runtime is gone; the bundled in-tree plugins have been migrated. Third-party plugins built against the old in-process API need to be ported to the sandboxed runtime.
+- **Plugins**: Server-managed bundles must be Ed25519-signed by the host and approved by an admin before they load. The host public key is served from `/api/plugin-signing-pubkey` and each bundle response carries the signature in the `X-Bundle-Signature` header. User-uploaded bundles still load unsigned, but managed marketplace and dev-folder bundles do not.
+- **Plugins**: `bundleHash` is now a full SHA-256 over the bundle. Legacy short hashes are migrated on first load; any out-of-band tooling that pinned the old hash format needs to be updated.
+
+### Features
+
+- **Pro**: Tabbed shell with drag-to-reorder, drag-to-edge to split, side-by-side panes, and pane-aware responsive layout with a scoped sidebar overlay
+- **Pro**: Auto-redirect to the Pro shell when Pro mode is on; `proInterface` is kept per-device instead of syncing
+- **Pro**: Multi-account mail sidebar with client routing and a per-account mailbox cache
+- **Pro**: Unified mailbox always visible, with full-text search
+- **Pro**: Cross-account email moves
+- **Pro**: Multi-account calendar sidebar split into owned vs shared per account
+- **Pro**: Multi-account contacts and a cross-account file picker
+- **Pro**: Composer From dropdown grouped by account
+- **Plugins**: Per-plugin admin approval workflow with Ed25519 bundle signing verified on load
+- **Plugins**: Marketplace update flow for installed plugins and themes
+- **Setup**: Allow the setup wizard over plain HTTP with a dismissable warning gate
+- **Setup**: Warn when the JMAP URL points at a local-only host
+- **Account**: List and reorder logged-in accounts from settings (#282)
+- **Mail**: Mobile handoff page with JMAP authentication verification for cross-device OAuth
+- **Mail**: Pluggable reply/forward quote header (#295)
+- **Calendar**: Support multiple flexible event reminders (#170)
+- **Admin**: Expose PWA, app identity, and extension directory keys in the JSON config (#312)
+- **Admin**: Surface OAuth scope settings and wire up orphaned admin policy gates
+
+### Security
+
+- **Plugins**: Pin parent origin in the iframe bridge to block cross-frame postMessage
+- **Plugins**: Ignore plugin-supplied `target` in `ui.openExternalUrl` to block host-frame hijack
+- **Plugins**: Validate plugin/theme id in marketplace install to block path traversal
+- **Plugins**: Prevent plugin config from leaking to non-admin users
+- **Admin**: Gate admin routes against cross-origin CSRF
+- **Auth**: Bind Stalwart auth context to the credential, not the cookie-claimed username
+- **Auth**: Validate OAuth discovery endpoints against SSRF
+- **Mail**: Tighten HTML sanitization at plain-text email, signature, and i18n render sites
+- **Mail**: Block script-bearing MIME types from inline attachment preview
+- **Mail**: Escape print-window fields and re-sanitize body to block XSS
+- **S/MIME**: Stop persisting passphrases in `sessionStorage`
+- **API**: Correct regex for valid API POST path validation
+
+### Fixes
+
+- **Mail**: Serialize draft autosave with send to stop replies stalling in Drafts (#303)
+- **Mail**: Omit empty cc/bcc from `Email/set` so the server does not emit a bare `Cc:` header (#301)
+- **Mobile**: Allow adding contacts from the mail recipient popover (#306)
+- **Mobile**: Prevent dual-scroll and use full width for mail content
+- **Mobile**: OAuth handoff flow
+- **Calendar**: Scope iCal subscriptions per JMAP account; fix refresh and clear
+- **Calendar**: iCal subscription refresh, rollback, and URL normalization
+- **Calendar**: Show avatars in the calendar/address book sharing menu
+- **Contacts**: Normalize malformed contact photo data URIs (#307)
+- **Identity**: Clear identity signature fields when emptied
+- **Identity**: Show size cap on identity signature fields
+- **Identity**: Allow table-based layouts in the HTML signature sanitizer
+- **Plugins**: Load `globals.css` and Geist font in the plugin sandbox iframe
+- **Plugins**: Sync plugin slot iframe height with reported content height
+- **Plugins**: Use plugin slot offer snapshots for `useSyncExternalStore`
+- **Plugins**: Trust the directory version on marketplace install and update
+- **Filters**: Prevent duplication of Bulwark rules with literal braces in values
+- **Setup**: Defer setup wizard HTTP detection to avoid hydration mismatch
+- **Routing**: Anchor unmatched URLs into `main` so 404 renders
+- **Routing**: Respect server-resolved locale on first visit (#309)
+- **Routing**: Split app into `(main)`/`(sandbox)` route groups so the plugin iframe hydrates properly
+- **Files**: Stop parent directory navigation from jumping to root
+- **Build**: Stop pulling `node:dns` into the client bundle via OAuth discovery
+- **UI**: Toggle recipient popover when clicking the name again
+- **UI**: Remove white halo around photo avatars
+
+### i18n
+
+- Add missing translation keys across 16 locales
+
+## 1.6.7 (2026-05-17)
+
+### Features
+
+- **Contacts**: vCard 4.0 parsing and generation support
+- **Admin**: Master-user impersonation route with `app-top-banner` plugin slot rendered on every authenticated page
+- **Admin**: Allow admin password overwrite during setup recovery
+- **Setup**: HTTPS requirement warning in the setup wizard
+- **Mobile**: Show details toggle and expandable panel for sender info
+
+### Performance
+
+- **Calendar**: Speed up calendar invitation banner load
+
+### Security
+
+- **Mail**: Sandbox thread email HTML in `srcDoc` iframe with a CSP `<meta>` tag
+- **Admin**: Redact sensitive config secrets from the admin API response
+- **Admin**: Make impersonation cookies session-only
+
+### Fixes
+
+- **Auth**: Read `OAUTH_SCOPES` at runtime instead of build time
+- **Auth**: Use a relative `Location` header in redirects
+- **Auth**: Adopt orphan session cookie on first SPA load
+- **Mail**: Per-account push subscriptions so multi-account notifications work (#298)
+- **Mail**: Close attachment preview when clicking outside the content area
+- **Mail**: Pin quick reply to the bottom for short emails
+- **Mail**: Show "no body content" instead of an infinite skeleton for bodyless emails
+- **Mail**: Show contact popup when clicking the sender name in the email header
+- **Mail**: Prevent long addresses from overflowing email details columns (#297)
+- **Mobile**: Align quick reply with the mobile bottom toolbar
+- **Mobile**: Respect safe-area insets on mobile bottom bars
+- **Mobile**: Pad `safe-area-inset-top`
+- **UI**: Apply dark background to the email content wrapper in dark mode
+- **UI**: Improve dark mode background colors in the email viewer
+- **UI**: Add viewport export with `initialScale: 1`
+- **UI**: Strip the Stalwart master-user `%` suffix from the displayed account
+- **Plugins**: Warn and block install when the app version is below the plugin's `minAppVersion`
+- **Plugins**: Register `app-top-banner` in plugin-store `SLOT_NAMES`
+- **Plugins**: Carry `configSchema` + `settingsSchema` through marketplace install
+- **Build**: Add `outputFileTracingExcludes` to reduce Turbopack memory tracing
+
+### i18n
+
+- Add missing translation keys across 16 locales
+
+## 1.6.6 (2026-05-15)
+
+### Features
+
+- **Mail**: Sync onboarding completion state across devices so the welcome flow only runs once per account (#285)
+- **Mail**: Distinct icons for Shared, Important, Memos, Scheduled, and Snoozed folders (#288)
+- **Compose**: Raise HTML identity signature length cap to 50,000 characters
+- **Compose**: Allow `<img>` tags in HTML identity signatures for inline logos and banners
+
+### Fixes
+
+- **Files**: Hide Files settings entry and sidebar nav when the `filesEnabled` policy is off (#291)
+- **Admin**: Honor the `cookieSameSite` admin config override instead of always defaulting (#284)
+- **UI**: Standardize punctuation in tooltips and inline comments across locales
+
+### i18n
+
+- Add Danish localization
+- Clean up Danish locale wiring and sort the language picker alphabetically (#286)
+
+## 1.6.5 (2026-05-13)
+
+### Features
+
+- **Protocol**: Register as the system handler for `mailto:` and `webcal:` links from a new protocol handler settings page
+- **Protocol**: Account picker for protocol links when multiple accounts are connected
+- **Protocol**: Import-or-subscribe choice for detected webcal calendars
+- **Protocol**: Reuse the open PWA/session for `mailto:` links instead of always opening a new tab
+- **UI**: Route account avatars through the shared `Avatar` component for consistent fallbacks (#278)
+
+### Fixes
+
+- **Calendar**: Support HTTP basic auth in iCal subscription URLs (#275)
+- **Admin**: Honor admin-uploaded favicon in root metadata (#274)
+- **Admin**: Honor `NEXT_PUBLIC_BASE_PATH` in admin sidebar nav links (#271)
+- **UI**: Broaden body font stack so Thai (and other non-Latin scripts) render correctly in subjects, sender names, and other chrome (#265)
+
+## 1.6.4 (2026-05-11)
+
+### Web Setup Wizard
+
+First-launch web setup wizard. New installs no longer need to hand-edit `.env.local` - point a browser at the container and the wizard probes the JMAP server(s), configures OAuth/OIDC, generates the session secret, accepts branding uploads, and provisions the initial admin password. Admin storage is now split into `ADMIN_CONFIG_DIR` (operator-authored, mountable read-only after setup) and `ADMIN_STATE_DIR` (runtime audit log and login timestamps); the legacy `ADMIN_DATA_DIR` keeps working for existing installs.
+
+### Features
+
+- **Setup**: Web setup wizard with multi-step flow: Server, Auth, Security, Logging, Branding, Review, Admin
+- **Setup**: Admin config/state directory split with optional `ADMIN_CONFIG_READONLY` for immutable deployments (#226)
+- **Setup**: File uploads on the wizard branding step
+- **Setup**: Redesigned review step with grouped summary and an advanced toggle for the full config
+- **Setup**: Require explicit confirmation when JMAP probe finds no session
+- **Mail**: Drag attachments out of the viewer to the local file system (#267)
+- **Mail**: Reading Pane at Bottom mail layout (#262)
+- **Mail**: Configurable signature position - above or below quoted text (#266)
+- **Mail**: Signature position is now searchable from the email behavior settings
+- **Mail**: Show avatar in Focused list for compact density and above
+- **Mail**: Align Focused list preview with other layout previews
+- **Compose**: From-header override in the composer with catch-all auto-reply, replies to an alias on a domain you own pre-fill the alias as the sender even when it isn't a configured identity (#246)
+
+### Performance
+
+- **Mail**: Prefetch initial email data on login
+- **Auth**: Parallelize login round-trips and drop redundant JMAP re-verify
+
+### Fixes
+
+- **Auth**: Skip upstream JMAP reverify for trusted URLs (#237)
+- **Auth**: Show account identity in the switcher header instead of the sending alias
+- **Compose**: Fall back to the primary identity signature on reply
+- **Setup**: Drop redundant first-login banner about removing `ADMIN_PASSWORD` (#222)
+- **UI**: Consistent notice cards for server probe results
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.3 (2026-05-08)
+
+### Features
+
+- **Mail**: Lift 5-account cap on HTTP/2
+- **Mail**: Import `.eml` files via folder right-click menu
+
+### Fixes
+
+- **Mail**: Trim leading whitespace from email list preview
+- **Mail**: Fall back when only the truncation indicator remains in email preview
+- **Mail**: Hide files/contacts nav items when JMAP server lacks support
+- **Viewer**: Preserve emoji colors in dark mode
+- **Viewer**: Prevent white-on-white in dark mode for nested `bgcolor` containers
+- **Viewer**: Render plain-text-only emails as text, not HTML
+- **Viewer**: Render HTML-only emails and redesign external content prompt
+- **Viewer**: Pad Word/Outlook HTML email rendering
+- **Compose**: Redesign quick reply to match sender/banner layout
+- **Compose**: Disable StarterKit's bundled link/underline to avoid duplicate extensions
+- **Sharing**: Request `shareWith` explicitly so calendar/address book shares survive a re-login (#257)
+- **UI**: Strip leading punctuation when computing avatar initials
+- **Mobile**: Hide email hover actions
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.2 (2026-05-06)
+
+### Features
+
+- **Plugins**: Hot-reload and dev-folder loading for live plugin development
+- **Plugins**: On-demand `src/` bundling via esbuild
+- **Plugins**: New `http:fetch` permission and `httpOrigins` manifest field
+- **Plugins**: `onBeforeEmailSend` hook with `fromEmail` exposed on `OutgoingEmail`
+- **Plugins**: Project `EmailReadView` for the email-banner slot and expose auth results
+- **Plugins**: Ingest icon, banner, and screenshots from the source repo
+- **Plugins**: Restrict plugin and theme install/uninstall to the admin dashboard
+- **Mail**: Multi-server JMAP support
+- **Settings**: Fulltext search across the settings sidebar
+- **Settings**: Sub-result rows with highlight in settings search
+- **Settings**: Surface plugin settings as search sub-results
+- **Settings**: Remove experimental tags from themes, plugins, and sender favicons
+- **Viewer**: Redesigned external-mail banner above attachments
+- **Calendar**: Calendar invitation banner expands on row click
+- **Calendar**: Calendar invitation banner is now collapsible
+
+### Fixes
+
+- **Admin**: Collapse admin panel into a single tabbed page
+- **Plugins**: Inline plugin configure panel to avoid dev-mode hang
+- **Plugins**: Resolve `PLUGIN_DEV_DIR` plugins in admin config route
+- **Plugins**: Add missing body type assertion in `createPluginAPI` fetch options
+- **Plugins**: Propagate `settingsSchema`
+- **Settings**: Highlight plugin and theme cards in search results
+- **Settings**: Open plugin card on first click of a setting sub-result
+- **Settings**: Drop ghost sub-results from account and language search
+- **Settings**: Improve search highlight styling
+- **Viewer**: Show notification banners above attachments
+- **Viewer**: Rework S/MIME banner to match calendar invitation
+- **Viewer**: Close PDF preview on Escape before email viewer
+- **Viewer**: Render PDF previews via `<object>` with `blob:` in object-src CSP (#253)
+- **Calendar**: Align invitation icon with sender avatar column
+- **Calendar**: Fix invitation picker clipping (#250)
+- **Auth**: Read `activeAccountId` from authStore in account selectors
+- **UI**: Adjust toast item border radius and progress bar styles
+- **UI**: Remove fly-in animation from context menu submenus
+- **i18n**: Add missing Czech flag icon
+
+### i18n
+
+- Add missing translation keys across 15 locales
+
+## 1.6.1 (2026-05-04)
+
+### Features
+
+- **Updates**: Update-available detection with non-dismissible notice and dev-reload refresh
+- **Plugins**: New plugin hooks for compose, attachments, search, lifecycle, and routing
+- **Sharing**: Share indicators for calendars and contacts, updated JMAP capabilities (#244)
+- **Mail**: Auto-add recipients to trusted senders when replying
+- **Identity**: Sanitize identity display name to prevent invalid `From` headers
+
+### Fixes
+
+- **Mobile**: Synchronize mobile submenu view with browser history for better navigation
+- **Viewer**: Update email viewer styles to improve overflow handling
+- **Auth**: Ensure `cookieSlot` consistency during account updates in auth store
+- **Auth**: Thread per-account cookie slot through OAuth flows
+- **Calendar**: Square the colored left marker on calendar events
+- **About**: Show git commit in About instead of "unknown"
+
+### i18n
+
+- Update mailbox context menu translations across 12 locales
+
+## 1.6.0 (2026-05-01)
+
+### Features
+
+- **Deployment**: Subpath deployment support via `NEXT_PUBLIC_BASE_PATH` environment variable
+- **Mail**: Image attachment thumbnails and preview chips
+- **Mobile**: Reworked mobile mail viewer toolbar
+- **Mobile**: Mobile-friendly settings panel
+- **Mobile**: Mobile-friendly admin panel
+- **Mail**: Redesigned expanded details panel
+- **Mailbox**: Show full path in mailbox context menu header with intelligent path shortening
+
+### Fixes
+
+- **Viewer**: Respect per-email dark mode toggle when "always show in light mode" is on
+- **Navigation**: Scroll apps list in navigation rail to prevent overflow
+- **Context menu**: Clamp submenu inside viewport
+- **Context menu**: Prevent context menu from clipping below viewport
+- **Context menu**: Prevent jump and animation on open
+- **Mail**: Stop silently destroying emails when trash mailbox isn't found (#195)
+- **Mail**: Preserve list scroll position when tagging an email
+- **Mail**: Render below-header overflow popup outside clipped row
+- **Mail**: Collapse below-header attachments to single row with overflow pill
+- **Push**: Fix push preview JMAP query
+- **Tour**: Navigate tour to mailbox when starting from another page
+- **i18n**: Add `useTranslations` for "selected emails" and "cancel" on email list batch operations
+
+### i18n
+
+- Translate SPF/DKIM/DMARC tooltips
+- Add missing keys across 14 locales
+
+## 1.5.4 (2026-05-01)
+
+### Features
+
+- **PWA**: Web push notifications for new inbox mail (#233), with click-through to open the message
+- **Composer**: Insert and edit tables in rich-text emails (#236)
+- **Mail**: Configurable sub-addressing delimiter character (#239)
+- **i18n**: Turkish localization
+- **i18n**: Missing keys filled in across 15 locales
+
+### Fixes
+
+- **Mail**: Set In-Reply-To and References headers on replies (#234)
+- **Mail**: Persist htmlBody in drafts to preserve rich formatting (#236)
+- **Auth**: Pin JMAP auth verification to the configured server URL (#237)
+- **Auth**: Evict unrecoverable basic-auth accounts on reload
+- **Notifications**: Scope new-mail notifications to genuine inbox deliveries
+- **Notifications**: Extend PushVerification timeout and clean up leftover subscriptions
+- **Viewer**: Smooth out body load to prevent flicker on first render
+- **Viewer**: Prevent iframe flash when loading images or trusting the sender
+- **Viewer**: Pad bare HTML emails like plain-text mails for consistent layout
+- **Viewer**: Light-mode override now only affects body content
+- **Viewer**: Detect `<style>` tag when applying padding
+- **Viewer**: Drop iframe border-radius
+- **Calendar**: Localize event start date in detail popover and event modal
+- **Dev**: Include http protocol in connect-src for development mode CSP
+
+## 1.5.3 (2026-04-28)
+
+> **New:** Help shape Bulwark Webmail. Each instance now sends a lightweight daily heartbeat (version, platform, bucketed account counts, feature toggles - never message data or PII) so we can see which platforms and features actually get used and prioritize fixes where they matter most. You're in control: opt out any time from **Admin → Telemetry** or by setting `BULWARK_TELEMETRY=off`. Full schema in the [privacy notice](https://bulwarkmail.org/docs/legal/privacy/telemetry).
+
+### Features
+
+- **Telemetry**: Anonymous instance telemetry, on by default. Reports schema version, platform, bucketed account counts, and feature toggles only - disable from the admin UI, with `BULWARK_TELEMETRY=off`, or by clearing the endpoint
+- **Telemetry**: Track unique logins (HMAC'd per instance, 90-day retention) so the heartbeat can report bucketed account totals without storing usernames
+- **Plugins**: Theme API v2 with token compiler and skin slot
+- **Plugins**: Extension preview page and detailed extension info API
+- **Calendar**: Right-click context menu on empty calendar space
+- **Docker**: Persistent named volume for telemetry data so the instance id and admin's consent choice survive container upgrades
+
+### Fixes
+
+- **Security**: Block telemetry endpoint from pointing at internal/loopback hosts (validation + DNS-rebind re-check at fetch time)
+- **Security**: Harden plugin config, TOTP token exchange, and branding file serving
+- **Mail**: Batch shortcuts now act on the multi-selection when one is present (#228)
+
 ## 1.5.2 (2026-04-27)
 
 ### Features
 
-- **Plugins**: New `composer-sidebar` slot and `ui:composer-sidebar` permission — plugins can now render a panel on either side of the New Message dialog. See `repos/subway-surfers` for an example
-- **Plugins**: Manifests can declare `frameOrigins` — a strictly-validated list of `https://host` origins the plugin needs to embed. The proxy reads the union from enabled plugins and merges it into the host CSP `frame-src`, so the host CSP no longer needs to know about specific embed providers
+- **Plugins**: New `composer-sidebar` slot and `ui:composer-sidebar` permission - plugins can now render a panel on either side of the New Message dialog. See `repos/subway-surfers` for an example
+- **Plugins**: Manifests can declare `frameOrigins` - a strictly-validated list of `https://host` origins the plugin needs to embed. The proxy reads the union from enabled plugins and merges it into the host CSP `frame-src`, so the host CSP no longer needs to know about specific embed providers
 - **Calendar/Contacts**: JMAP sharing for calendars and address books
 - **i18n**: Czech language support
 

CONTRIBUTING.md

@@ -10,22 +10,25 @@
 
 # Contributing to Bulwark Webmail
 
-Thank you for your interest in contributing to Bulwark Webmail! This document provides guidelines and information for contributors.
+We're writing the webmail we wanted in 2026 and didn't find: a JMAP-native client with an interface built this decade. It's AGPL and self-hosted, run by the people who use it rather than sold to them.
 
-## Join our Community
-**New to the project or looking for a place to start?** You don't need to be an expert to contribute! Whether you need help setting up your environment, want to report a bug, or are interested in helping with translations, our Discord is the best place to connect.
+If that sounds like your kind of project, we'd love the help.
 
-* **Get Support:** Get real-time help with development hurdles.
-* **Contribute:** Share ideas, suggest features, or help us improve documentation.
-* **Collaborate:** Meet the team and other contributors working to make Bulwark better.
+## Join the community
+
+You don't need to be an expert to contribute. A dev environment that won't start, a bug you're not sure how to report, a translation you're stuck on: Discord is the fastest way to get unstuck and to meet the people working on this.
+
+- **Get support** - real-time help with development hurdles
+- **Share ideas** - feature suggestions, design feedback, doc improvements
+- **Collaborate** - meet the team and other contributors
 
 [**Join the Bulwark Discord Server**](https://discord.gg/tYCujymGrT)
 
 ---
 
-## Getting Started
+## Getting started
 
-### Development Setup
+### Development setup
 
 1. **Fork and clone** the repository:
 
@@ -43,16 +46,22 @@ Thank you for your interest in contributing to Bulwark Webmail! This document pr
 3. **Set up environment**:
 
    ```bash
-   cp .env.example .env.local
-   # Edit .env.local with your JMAP server URL
+   cp .env.dev.example .env.local
    ```
 
+   This enables the built-in mock JMAP server (`DEV_MOCK_JMAP=true`), so you can
+   develop without a mail server. Log in with any username and password. To work
+   against a real server instead, copy `.env.example` and set `JMAP_SERVER_URL`.
+
 4. **Start development server**:
+
    ```bash
    npm run dev
    ```
 
-### Code Quality
+   Then open http://localhost:3000.
+
+### Code quality
 
 Before submitting a pull request, ensure your code passes all checks:
 
@@ -69,7 +78,20 @@ npm run lint:fix
 
 These checks run automatically on commit via Husky pre-commit hooks.
 
-## Code Style Guidelines
+### Testing
+
+| Suite            | Command                    | What it covers                                                     |
+| ---------------- | -------------------------- | ------------------------------------------------------------------ |
+| **Unit**         | `npx vitest run`           | Vitest + jsdom. Tests live in `__tests__/` folders next to the code |
+| **Translations** | `npm run test:translations` | Locale files checked for structural drift against English           |
+| **Integration**  | `npm run test:integration`  | Playwright against a real Stalwart server in Docker                 |
+| **E2E smoke**    | `npx playwright test`      | UI smoke tests against `npm run dev`                                |
+
+Run a single unit test file with `npx vitest run lib/__tests__/<name>.test.ts`, or `npx vitest` to watch.
+
+The integration suite needs Docker and takes several minutes; it has its own setup notes and findings log in [integration/README.md](integration/README.md). New behavior that touches mail/folder synchronization or multi-account handling belongs there.
+
+## Code style guidelines
 
 ### TypeScript
 
@@ -78,7 +100,7 @@ These checks run automatically on commit via Husky pre-commit hooks.
 - Avoid `any` types when possible
 - Use meaningful variable and function names
 
-### React Components
+### React components
 
 - Use functional components with hooks
 - Keep components focused and single-purpose
@@ -94,44 +116,53 @@ These checks run automatically on commit via Husky pre-commit hooks.
 
 ## Internationalization (i18n)
 
-This project uses **next-intl** for internationalization. Please follow these guidelines:
+This project uses **next-intl**. English (`/locales/en/common.json`) is the source of truth; we ship 23 additional locales (ar, ca, cs, da, de, es, fa, fr, he, hu, it, ja, ko, lv, nl, pl, pt, ro, ru, sk, tr, uk, zh).
 
-### Key Rules
+Arabic, Hebrew, and Persian render right-to-left (see `i18n/direction.ts`). Use Tailwind's **logical** utilities (`ms-*`/`me-*`, `ps-*`/`pe-*`, `start-*`/`end-*`) rather than physical ones (`ml-*`, `pl-*`, `left-*`) so layouts flip correctly. For popovers positioned in JS via `getBoundingClientRect()`, check `isDocumentRTL()`: inline `position: fixed` styles don't pick up logical utilities.
 
-1. **Never hardcode user-facing text** - Always use translations:
+### Rules
+
+1. **Never hardcode user-facing text** - always use translations:
 
    ```tsx
    const t = useTranslations("namespace");
    return <div>{t("key")}</div>;
    ```
 
-2. **Translation file locations**:
-   - English: `/locales/en/common.json`
-   - French: `/locales/fr/common.json`
+2. **Add new keys to `en/common.json` first.** Other locales can follow in the same PR or a follow-up - missing keys fall back to English.
 
 3. **Namespace organization**:
-   - `login.*` - Login page strings
-   - `sidebar.*` - Sidebar navigation
-   - `email_list.*` - Email list component
-   - `email_viewer.*` - Email viewer component
-   - `email_composer.*` - Email composer
-   - `common.*` - Shared strings
-   - `notifications.*` - Toast/alert messages
-   - `settings.*` - Settings page
+   - `login.*` - login page
+   - `sidebar.*` - sidebar navigation
+   - `email_list.*` - email list
+   - `email_viewer.*` - email viewer
+   - `email_composer.*` - composer
+   - `settings.*` - settings page
+   - `notifications.*` - toasts and alerts
+   - `common.*` - shared strings
 
-4. **Adding new strings**:
-   - Add to **both** English and French translation files
-   - Use descriptive, hierarchical keys
-   - Keep translations consistent in tone
+4. **Locale-aware navigation**:
 
-5. **Locale-aware navigation**:
    ```tsx
    router.push(`/${params.locale}/settings`);
    ```
 
-## Pull Request Process
+### Adding a new locale
 
-### Before Submitting
+Registering a new locale takes edits in four places:
+
+1. `locales/<code>/common.json` - copy `locales/en/common.json` and translate
+2. `i18n/routing.ts` - add the code to `SUPPORTED_LOCALES`
+3. `i18n/request.ts` - add a `case` to the static-import switch
+4. `components/ui/language-switcher.tsx` - add `{ value, label }` with the **native** language name, plus a flag in `components/ui/flag-icons.tsx`
+
+For a right-to-left language, also add the code to `rtlLocales` in `i18n/direction.ts`.
+
+Run `npm run test:translations` afterwards - it checks the locale files for structural drift against English.
+
+## Pull request process
+
+### Before submitting
 
 1. **Create a feature branch**:
 
@@ -141,13 +172,13 @@ This project uses **next-intl** for internationalization. Please follow these gu
 
 2. **Make your changes** following the code style guidelines
 
-3. **Test your changes** thoroughly
+3. **Test your changes** thoroughly, and add unit tests for new logic
 
 4. **Update translations** if you added user-facing text
 
 5. **Run all checks**:
    ```bash
-   npm run typecheck && npm run lint
+   npm run typecheck && npm run lint && npx vitest run
    ```
 
 ### Submitting
@@ -160,7 +191,7 @@ This project uses **next-intl** for internationalization. Please follow these gu
    - Screenshots for UI changes
    - Reference to any related issues
 
-### Commit Message Convention
+### Commit message convention
 
 Follow the conventional commits format:
 
@@ -180,39 +211,46 @@ fix: resolve attachment download issue
 docs: update README with keyboard shortcuts
 ```
 
-## Project Structure
+## Project structure
 
 ```
 webmail/
-├── app/                    # Next.js App Router pages
-│   └── [locale]/          # Locale-aware routing
-├── components/            # React components
-│   ├── email/            # Email-related components
-│   ├── layout/           # Layout components
-│   ├── settings/         # Settings components
-│   └── ui/               # Reusable UI components
-├── contexts/             # React contexts
-├── hooks/                # Custom React hooks
-├── lib/                  # Utilities and libraries
-│   └── jmap/            # JMAP client implementation
-├── locales/              # Translation files
-│   ├── en/              # English translations
-│   └── fr/              # French translations
-└── stores/               # Zustand state stores
+├── app/                       # Next.js App Router
+│   ├── (main)/[locale]/      # Locale-aware app pages (mail, calendar, contacts, files, settings)
+│   ├── (main)/admin/         # Admin dashboard
+│   ├── (main)/setup/         # First-launch setup wizard
+│   ├── (sandbox)/            # Isolated plugin sandbox routes
+│   └── api/                  # Route handlers (auth, admin, jmap, caldav, …)
+├── components/               # React components
+│   ├── email/               # Email list, viewer, composer
+│   ├── calendar/ contacts/ files/ filters/ templates/
+│   ├── layout/              # Sidebar, shell, navigation
+│   ├── settings/            # Settings panels
+│   ├── plugins/             # Plugin host UI
+│   └── ui/                  # Reusable primitives
+├── contexts/                 # React contexts
+├── hooks/                    # Custom React hooks
+├── i18n/                     # next-intl routing, locale detection, RTL direction
+├── lib/                      # Utilities and libraries
+│   ├── jmap/                # JMAP client implementation
+│   ├── stalwart/            # Stalwart-specific admin/API helpers
+│   ├── admin/ auth/ oauth/  # Config, sessions, OAuth flows
+│   ├── plugin-sandbox/      # Plugin sandbox bridge and hardening
+│   └── __tests__/           # Vitest unit tests
+├── locales/                  # Translation files, one directory per locale
+├── stores/                   # Zustand state stores
+├── public/                   # Static assets and branding
+├── e2e/                      # Playwright smoke tests (against `npm run dev`)
+└── integration/              # Dockerized Stalwart + Playwright suite
 ```
 
 ## Security
 
-- **Never commit sensitive data** (API keys, passwords, etc.)
+- **Never commit secrets** - API keys, passwords, tokens, `.env*` files
 - **Sanitize user input** and email content
-- **Block external content** by default for privacy
-- Report security vulnerabilities privately (e.g. bulwark@rbm.systems)
+- **Block external content** by default - privacy is the point
+- **Report vulnerabilities privately** to bulwark@rbm.systems, not via public issues
 
 ## Questions?
 
-If you have questions about contributing, feel free to:
-
-- Open an issue for discussion
-- Check existing issues and pull requests
-
-Thank you for helping improve Bulwark Webmail!
+Open an issue, search existing ones, or ask in Discord. Thanks for helping build the webmail we all wished existed.

Dockerfile

@@ -4,6 +4,23 @@ COPY package.json package-lock.json ./
 RUN npm ci
 COPY . .
 ENV NEXT_TELEMETRY_DISABLED=1
+# Optional: serve under a subpath like /webmail. Baked into emitted asset URLs
+# at build time, so it cannot be changed without rebuilding.
+ARG NEXT_PUBLIC_BASE_PATH=
+ENV NEXT_PUBLIC_BASE_PATH=$NEXT_PUBLIC_BASE_PATH
+# Optional: avoid next-intl rewrite loops when served under a subpath.
+# Baked in at build time.
+ARG NEXT_PUBLIC_LOCALE_PREFIX=
+ENV NEXT_PUBLIC_LOCALE_PREFIX=$NEXT_PUBLIC_LOCALE_PREFIX
+# Optional: fallback UI locale (e.g. tr, de, fr) used when the visitor's
+# Accept-Language header does not match any supported locale. Baked in at
+# build time because next-intl wires it into client-side routing too.
+ARG NEXT_PUBLIC_DEFAULT_LOCALE=
+ENV NEXT_PUBLIC_DEFAULT_LOCALE=$NEXT_PUBLIC_DEFAULT_LOCALE
+# Commit SHA shown in the About screen. .dockerignore excludes .git, so
+# `git rev-parse` inside the build can't find it - CI must pass it in.
+ARG GIT_COMMIT=unknown
+ENV GIT_COMMIT=$GIT_COMMIT
 RUN npx next build --webpack
 
 FROM node:24-alpine AS runner
@@ -26,7 +43,7 @@ RUN apk upgrade --no-cache && \
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
-RUN mkdir -p /app/data/settings /app/data/admin && chown -R nextjs:nodejs /app/data
+RUN mkdir -p /app/data/settings /app/data/admin /app/data/admin-state /app/data/telemetry && chown -R nextjs:nodejs /app/data
 USER nextjs
 EXPOSE 3000
 ENV PORT=3000

FEATURES.md

@@ -2,123 +2,149 @@
 
 ## Mail
 
-- Read, compose, reply, reply-all, and forward with a Tiptap rich text editor (inline images, drag-and-drop embedding)
-- Gmail-style threading with inline expansion and an optional conversation toggle
-- Unified mailbox view across all connected accounts
-- Draft auto-save with identity preservation
-- Attachment upload, download, and inline preview; forgotten-attachment warning
-- Full-text search with JMAP filter panel, search chips, wildcards, OR conditions, and cross-mailbox queries
-- Batch operations – multi-select, archive, delete, move, tag
-- Archive modes – direct, by year, or by month
-- Multi-tag support with color labels, reordering, and drag-and-drop assignment
-- Star/unstar with configurable mark-as-read delay
-- Virtual scrolling for large mailboxes
-- Quick reply, hover actions, sender avatars (favicon-based), and recipient popovers
-- Plain-text composer mode and Reply-To support
+- Read, compose, reply, reply-all, and forward in a Tiptap rich-text editor that handles inline images, drag-and-drop embedding, and tables
+- Gmail-style threading, expanded inline, with a conversation toggle you can switch off
+- The Unified Mailbox combines Inbox, Sent, Drafts, Junk, Archive, and Trash. By default it stays inside the active account and its shared/group folders; an admin can unlock a cross-account mode that spans every connected account.
+- All mail, Unread, and Starred obey that same account boundary and can be narrowed to a per-account folder selection. Every row names the folder its message came from.
+- Search runs across all unified views; the per-role mailboxes add the full filter panel on top
+- Three mail layouts: split three-pane, focused list, or reading pane at the bottom
+- Drafts auto-save, keeping the chosen identity, the HTML body, and correct `In-Reply-To` / `References` headers on replies
+- Attachments upload, download, drag out to the file system, and preview inline. Images and PDFs render on desktop and mobile, composer attachments open on click, and `.eml` (`message/rfc822`) parts display as a nested email. There are list thumbnails, and a warning when you mention an attachment and forget it.
+- Scheduled send, plus a configurable delay before anything leaves the outbox
+- Read receipts (MDN, RFC 8098)
+- Quoted text lands in an editable island that keeps the original layout
+- Full-text search with a JMAP filter panel, search chips, wildcards, OR conditions, and cross-mailbox queries
+- Multi-select for batch archive, delete, move, and tag
+- Archive directly, by year, or by month
+- Tags carry color labels, reorder by drag, and can be assigned by dropping a message onto them
+- Tags optionally nest: pick a parent when you create one and the sidebar turns them into a tree
+- Each tag can be configured to show always, only when there are unread mails or always be hidden
+- Star or unstar, with a configurable mark-as-read delay
+- Large mailboxes scroll virtually, and the first page of mail prefetches at login
+- Quick reply, hover actions, favicon-based sender avatars, recipient popovers
+- Plain-text composer mode and Reply-To
+- The signature sits above or below the quoted text, per identity
+- Override the From header in the composer. Reply to an alias on a domain you own and it auto-fills as the sender, even when no identity exists for it.
+- Import `.eml` files from the folder right-click menu
 - TNEF (`winmail.dat`) extraction and `message/rfc822` unwrapping
-- Folder management with icon picker, subfolders, and sidebar counts
-- Print directly from the viewer
-- Browser history sync for back/forward navigation
+- Folders take an icon, nest, and show counts in the sidebar
+- Print from the viewer
+- Browser back and forward move through mail history
 
 ## Calendar
 
-- Month, week, day, and agenda views with a mini-calendar sidebar and task list
-- Drag-to-reschedule, click-drag creation, and edge-resize with 15-minute snap
-- Recurring events with scoped edit/delete (this / this and following / all)
-- iMIP invitations on create and update (RFC 5545 / 6047), organizer/attendee UI, and RSVP with trust assessment
-- Inline calendar invitations in the email viewer – auto-detect `.ics`, RSVP, import
-- iCalendar import with preview, bulk create, and UID deduplication
-- iCal / webcal subscriptions with editing and batch import
-- Auto-generated birthday calendar from contacts
-- Virtual locations (video conference URLs) as first-class event fields
-- Task management with due dates, priority, and completion status
-- Shared calendars with CalDAV discovery and multi-account home resolution
-- Week numbers, event hover preview, notifications with sound picker
-- Real-time sync via JMAP push
+- Month, week, day, and agenda views, with a mini-calendar and task list in the sidebar
+- Drag an event to reschedule it, click-drag to create one, pull an edge to resize. Everything snaps to 15 minutes.
+- Recurring events edit and delete by scope: this occurrence, this and following, or all
+- iMIP invitations on create and update (RFC 5545 / 6047), an organizer/attendee panel, and RSVP with trust assessment
+- `.ics` attachments are detected in the email viewer, so you can RSVP or import without leaving the message
+- iCalendar import previews first, then bulk-creates, deduplicating on UID
+- iCal / webcal subscriptions, editable, with batch import
+- A birthday calendar generated from your contacts
+- Virtual locations (video-conference URLs) are first-class event fields
+- Tasks with due dates, priority, and completion status
+- Shared calendars through CalDAV discovery, resolving homes across accounts, colored per viewer
+- Week numbers, hover preview, notifications with a sound picker
+- JMAP push keeps everything in sync
 
 ## Contacts
 
-- JMAP sync (RFC 9553 / 9610) with local fallback
-- Multiple address books with drag-and-drop between books
-- Contact groups with member management
-- vCard import/export (RFC 6350) with duplicate detection
-- Trusted senders stored in a dedicated JMAP address book
-- Autocomplete in the composer (To / Cc / Bcc)
+- JMAP sync (RFC 9553 / 9610), falling back to local storage
+- Several address books, with drag-and-drop between them
+- Groups with member management
+- vCard import/export (RFC 6350) that flags duplicates
+- Trusted senders live in their own JMAP address book
+- Autocomplete on To, Cc, and Bcc
 
-## Filters & Templates
+## Filters & templates
 
-- Server-side filters via JMAP Sieve Scripts (RFC 9661)
-- Visual rule builder with expanded view; conditions (From, To, Subject, Size, Body…) and actions (Move, Forward, Star, Discard…)
-- Preserves rules authored in other clients
+- Server-side filters as JMAP Sieve Scripts (RFC 9661)
+- A visual rule builder: conditions on From, To, Subject, Size, Body, Attachment and more, each matching multiple values, with actions to move, forward, star, or discard
+- Rules written in other clients survive the round-trip
 - Raw Sieve editor with syntax validation
-- Vacation responder with date range scheduling
-- Reusable email templates with placeholder auto-fill (`{{recipientName}}`, `{{date}}`, …)
+- A vacation responder you can schedule to a date range
+- Templates with placeholder auto-fill (`{{recipientName}}`, `{{date}}`, …)
 
 ## Files
 
-- JMAP FileNode browser (Stalwart native cloud storage)
-- Streamed WebDAV PUT upload and folder upload with progress tracking
-- Dynamic upload limits based on server configuration
-- Grid and list views with sorting by name, size, or date
-- Previews for images, text, audio, and video
-- Clipboard operations (cut, copy, paste, duplicate), favorites, and recent files
+- Browse Stalwart's native JMAP FileNode storage as a real folder tree. Legacy flat-named files migrate into nested `FileNode` folders on first load.
+- Streamed WebDAV PUT upload, whole folders included, with progress
+- Upload limits follow the server's own configuration
+- Grid or list, sorted by name, size, or date
+- Preview images, text, audio, and video
+- Cut, copy, paste, duplicate; favorites; recent files
+- JMAP sharing (RFC 9670) for files and folders. Pick a user or group from the principal picker and grant read, read/write, or manager. Shared items get an indicator, and anything other principals share with you appears under "Shared with me".
 
-## Security & Privacy
+## Security & privacy
 
-- External content blocked by default, with a trusted senders list
-- HTML sanitization via DOMPurify
-- S/MIME – manage certificates, sign, encrypt, decrypt, and verify; legacy 3DES / PBE support; per-account key isolation
-- SPF / DKIM / DMARC status indicators
-- OAuth2 / OIDC with PKCE (Keycloak, Authentik, or built-in), OAuth-only mode, OAuth app passwords, and non-interactive SSO for embedded deployments
+- External content stays blocked until you say otherwise, and trusted senders are remembered
+- HTML sanitized through DOMPurify
+- S/MIME: manage certificates, then sign, encrypt, decrypt, and verify. Legacy 3DES / PBE is supported, and keys stay isolated per account.
+- SPF / DKIM / DMARC indicators surface the most severe SPF result and drop the "via" badge on spoofed mail
+- OAuth2 / OIDC with PKCE against Keycloak, Authentik, or the built-in provider, plus OAuth-only mode, OAuth app passwords, and non-interactive SSO for embedded deployments
 - TOTP two-factor authentication
-- Account security panel for password and 2FA management via the Stalwart admin API
-- Optional "Remember me" via AES-256-GCM encrypted httpOnly cookie
-- Enforced CSP with per-request nonce, SSRF redirect validation, PDF iframe sandbox, and IP spoofing prevention
-- Plugin hardening with dangerous-pattern detection and admin approval
+- Password and 2FA management through the Stalwart admin API
+- "Remember me" is optional and rides an AES-256-GCM encrypted httpOnly cookie
+- CSP is enforced with a per-request nonce, alongside SSRF redirect validation, a sandboxed PDF iframe, and IP spoofing prevention
+- Plugins are scanned for dangerous patterns and need admin approval
 - Newsletter unsubscribe (RFC 2369)
 
 ## Interface
 
-- Three-pane layout with resizable columns
-- Dark and light themes with intelligent email color transformation
-- Responsive desktop, tablet, and mobile layouts
+- Split three-pane, focused list, or bottom reading pane, columns resizable
+- Dark and light themes. Email colors are remapped by luminance, so a mail hard-coded to dark-on-white stays readable on a dark background.
+- Bundled themes such as Aurora Glass and Elastic. Each theme card renders as a miniature mailbox built from that theme's own colors, with chips for the light and dark variants.
+- Layouts for desktop, tablet, and mobile
 - Full keyboard navigation
-- Drag-and-drop email organization and tag assignment
-- Interactive guided tour for new users
-- Right-click context menus, toast notifications with undo
-- Customizable toolbar position, favicon, and login branding
-- Pinnable sidebar apps with drag-and-drop reordering
-- Encrypted settings sync across devices
+- Drag and drop to organize mail and assign tags
+- A guided tour for first-time users
+- Right-click menus, and toasts that offer an undo
+- Toolbar position, favicon, and login branding are configurable
+- Sidebar apps pin and reorder by drag
+- Settings sync between devices, encrypted
 - Storage quota display
-- WCAG AA contrast, reduced-motion support, focus trap, and screen reader live regions
+- WCAG AA contrast, reduced-motion support, focus traps, and screen-reader live regions
 
 ## Internationalization
 
-14 languages: English · Français · 日本語 · Español · Italiano · Deutsch · Nederlands · Português · Русский · 한국어 · Polski · Latviešu · 简体中文 · Українська
+24 languages: Català · Česky · Dansk · Deutsch · English · Español · Français · Italiano · Latviešu · Magyar · Nederlands · Polski · Português · Română · Slovenčina · Türkçe · Русский · Українська · עברית · العربية · فارسی · 한국어 · 日本語 · 简体中文
 
-Automatic browser detection with persistent preference. Configurable locale URL prefix via `NEXT_PUBLIC_LOCALE_PREFIX`.
+- Arabic, Hebrew, and Persian render right-to-left; document direction and logical layout flip automatically
+- The browser's `Accept-Language` picks the first language, and the choice persists per user
+- `NEXT_PUBLIC_DEFAULT_LOCALE` sets the fallback, `NEXT_PUBLIC_LOCALE_PREFIX` the URL prefix
 
-## Identity & Multi-Account
+## Identity & multi-account
 
-- Up to 5 simultaneous accounts with instant switching and per-account session persistence
-- Account switcher with connection status and default account selection
-- Multiple sender identities with per-identity signatures, automatic sync, and badges in viewer/list
-- Sub-addressing (`user+tag@domain.com`) with contextual tag suggestions
+- Run several accounts at once and switch instantly, each keeping its own session. The 5-account cap lifts on HTTP/2 servers; on HTTP/1.1, browser connection pooling still sets the limit.
+- An account switcher showing connection status, and a default account
+- Multiple sender identities, each with its own signature, synced automatically and badged in the viewer and list
+- Signature above or below the quoted text
+- Sub-addressing (`user+tag@domain.com`), delimiter configurable, with tag suggestions drawn from context
 - Shared folders across accounts
-- Optional custom JMAP endpoints on the login form (`ALLOW_CUSTOM_JMAP_ENDPOINT`)
+- Shared and group (delegated) accounts put their folders next to your own, and "Include group inboxes" merges them into the Unified Mailbox. You can open, mark read, flag as spam or not-spam, move, delete, and archive their messages from there, and folder unread counts stay in step.
+- Several JMAP servers per deployment, optionally auto-picked by email domain
+- Custom JMAP endpoints on the login form, when `ALLOW_CUSTOM_JMAP_ENDPOINT` permits it
 
-## Admin & Extensibility
+## Admin & extensibility
 
-- Stalwart admin dashboard with dedicated policy sections
-- Plugin system – schema-driven config UI, render and intercept hooks, `onAvatarResolve` and i18n APIs, calendar event slots, and managed policy enforcement
-- Themes – upload, enforce, and manage admin-controlled themes as ZIP bundles
-- Extension marketplace – browse and install plugins and themes from a configurable directory (`EXTENSION_DIRECTORY_URL`)
-- Bundled plugins including Jitsi Meet calendar integration
+- A setup wizard runs on first launch and walks through JMAP servers, OAuth/OIDC, the session secret, logging, branding (uploads included), and the admin password. It writes to the admin config dir, so `.env.local` stays untouched.
+- The Stalwart admin dashboard, its policy sections collapsed into one tabbed page
+- Admin policy gates for the Unified Mailbox: turn All mail / Unread / Starred on or off org-wide, and gate cross-account capability separately (off by default, auto-enabled on upgrade for instances already using it). A gated view still respects the user's own toggle.
+- Admin storage splits in two. `ADMIN_CONFIG_DIR` is operator-authored and can be mounted read-only once setup finishes; `ADMIN_STATE_DIR` holds the runtime audit log and login timestamps.
+- JSON config can read secrets from files (`passwordHashFile`, `sessionSecretFile`, `oauthClientSecretFile`) for Docker and Kubernetes secret mounts
+- An admin toggle controls search-engine indexing (`robots.txt` / `noindex`)
+- Plugin system: a schema-driven config UI, render and intercept hooks, `onAvatarResolve`, `onBeforeEmailSend`, composer-sidebar and email-banner slots, calendar event slots, i18n APIs (sandboxed plugins localize through manifest locales and `api.i18n.t`), an `/api/translate` proxy, email-body access, and managed policy enforcement
+- Plugins hot-reload, load from a dev folder, bundle `src/` on demand through esbuild, and can request `http:fetch` scoped by `httpOrigins`
+- Themes upload as ZIP bundles, and admins can enforce one
+- An extension marketplace browses and installs plugins and themes from a configurable directory (`EXTENSION_DIRECTORY_URL`). Installing and uninstalling stay in the admin dashboard.
+- Bundled plugins, including Jitsi Meet for the calendar
 
 ## Operations
 
-- Progressive Web App with service worker, install prompt, and dynamic manifest
-- Automatic update check with server-side logging of new releases
-- Structured logging (`text` or `json`) with category-based levels
-- Release (`main`) and development (`dev`) Docker images on GHCR
-- Demo mode with fixture data – no mail server required
+- Progressive Web App: service worker, install prompt, web push for new inbox mail, a dynamic manifest, and install screenshots configurable per domain
+- Update checks run on their own, log new releases server-side, and raise a notice that can't be dismissed
+- Structured logging (`text` or `json`) with per-category levels
+- Anonymous instance telemetry, off unless you enable it through the admin UI, the installer, or `BULWARK_TELEMETRY=on`. It reports version, platform, bucketed account counts, and feature toggles.
+- Docker images on GHCR, for release (`main`) and development (`dev`)
+- `NEXT_PUBLIC_BASE_PATH` mounts the app at a subpath behind a reverse proxy
+- Demo mode runs on fixture data, no mail server required

README.md

@@ -8,17 +8,34 @@
 
 # Bulwark Webmail
 
-A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/), built with Next.js and the JMAP protocol.
+A self-hosted webmail client for [Stalwart Mail Server](https://stalw.art/), built with Next.js and the JMAP protocol.
 
 [![License: AGPL v3](https://img.shields.io/badge/license-AGPL%20v3-blue.svg?logo=gnu&logoColor=white)](LICENSE)
 [![Discord](https://img.shields.io/discord/1482128142939455674?color=7289da&label=discord&logo=discord&logoColor=white)](https://discord.gg/tYCujymGrT)
-[![Version](https://img.shields.io/badge/version-1.5.2-green.svg?logo=git&logoColor=white)](CHANGELOG.md)
+[![Version](https://img.shields.io/badge/version-1.7.8-green.svg?logo=git&logoColor=white)](CHANGELOG.md)
 [![Docker](https://img.shields.io/badge/docker-ghcr.io%2Fbulwarkmail%2Fwebmail-blue?logo=docker&logoColor=white)](https://ghcr.io/bulwarkmail/webmail)
-
 </div>
 
 ---
 
+## Installer
+
+Since **1.6.4**, a web-based setup wizard runs on first launch – no `.env.local` editing, no shelling into the container.
+
+Point a browser at the running container and the wizard guides you through:
+
+- **Server** – probe one or more JMAP endpoints, optional auto-pick by email domain, Stalwart feature toggle
+- **Auth** – OAuth2 / OIDC discovery and validation, or basic-auth fallback
+- **Security** – generate or paste a `SESSION_SECRET`, opt into settings sync
+- **Logging** – text or JSON, level
+- **Branding** – upload favicon, app logos, login logos, and company / legal URLs
+- **Review** – grouped summary with an advanced toggle for the full config
+- **Admin** – set the initial admin password and optionally drop a `.config-locked` marker so the config volume can be remounted read-only
+
+The wizard writes to `ADMIN_CONFIG_DIR` (`./data/admin` by default). Setting `JMAP_SERVER_URL` in the environment skips the wizard and uses env-managed configuration instead.
+
+---
+
 ## Screenshots
 
 <picture>
@@ -48,72 +65,73 @@ A modern, self-hosted webmail client for [Stalwart Mail Server](https://stalw.ar
 <td><img src="screenshots/settings.png" alt="Settings" /></td>
 </tr>
 <tr>
-<td><sub><b>Light mode</b> – full theme support with intelligent color transformation for HTML emails.</sub></td>
+<td><sub><b>Light mode</b> – full theme support, remapping HTML email colors by luminance so dark-on-dark text stays readable.</sub></td>
 <td><sub><b>Settings</b> – appearance, identities, filters, templates, security, and more.</sub></td>
 </tr>
 </table>
 
-## Overview
+## What Bulwark includes
 
-Bulwark is a full webmail suite – not just an inbox. It bundles the four apps most self-hosters end up wanting on the same login:
+Bulwark is a full webmail suite. It bundles the four apps most self-hosters end up wanting:
 
-- **Mail** – threading, unified inbox, full-text search, Sieve filters, S/MIME, templates
+- **Mail** – threading, unified inbox, cross-account "All accounts" views, full-text search, Sieve filters, S/MIME, templates
 - **Calendar** – month/week/day/agenda, recurring events, iMIP invitations, CalDAV subscriptions
 - **Contacts** – multiple address books, groups, vCard import/export
 - **Files** – Stalwart's JMAP FileNode storage with previews and folder upload
 
-Plus the infrastructure around them: OAuth2 / OIDC SSO, TOTP 2FA, multi-account (up to 5 at once), 15 languages, PWA install, dark/light themes, a plugin system with an extension marketplace, and a admin dashboard.
+They share one login, one settings store, and one admin dashboard. SSO, 2FA, multi-account, 24 languages, PWA install, themes, and plugins apply across all four.
 
 Full feature list: **[FEATURES.md](FEATURES.md)**.
 
 ---
 
-## Quick Start
+## Quick start
 
 ### Docker
 
 ```bash
-docker run -d -p 3000:3000 \
-  -e JMAP_SERVER_URL=https://mail.example.com \
-  ghcr.io/bulwarkmail/webmail:latest
+docker run -d -p 3000:3000 ghcr.io/bulwarkmail/webmail:latest
 ```
 
 Or with Docker Compose:
 
 ```bash
-cp .env.example .env.local
-# Edit .env.local – set JMAP_SERVER_URL
 docker compose up -d
 ```
 
-### From Source
+On first launch, open `http://localhost:3000` and the setup wizard takes over. Installs that already define `JMAP_SERVER_URL` skip it and keep the env-managed flow under [Configuration](#configuration).
+
+### From source
 
 ```bash
 git clone https://github.com/bulwarkmail/webmail.git
 cd webmail
 npm install
-cp .env.example .env.local
-# Edit .env.local – set JMAP_SERVER_URL
 npm run build && npm start
+# Then open http://localhost:3000 to run the setup wizard
 ```
 
 ### Development
 
 ```bash
-npm run dev        # Dev server with a mock JMAP server
+cp .env.dev.example .env.local   # Built-in mock JMAP server, no mail server needed
+
+npm run dev                # Dev server
 npm run typecheck
 npm run lint
+npx vitest run             # Unit tests
+npm run test:integration   # Dockerized Stalwart + Playwright suite (see integration/README.md)
 ```
 
 ## Configuration
 
-All variables are evaluated at runtime, so Docker deployments can be reconfigured without rebuilding. Edit `.env.local`:
+Most deployments are configured through the setup wizard on first launch, then the admin dashboard; those values live in the admin config directory rather than `.env.local`. Environment variables still work, and they suit read-only or immutable infrastructure better. An environment variable always wins over the admin-managed value, so setting `JMAP_SERVER_URL` hides that field from the wizard and locks it in the admin UI.
+
+Nearly all variables are evaluated at runtime, so Docker deployments can be reconfigured without rebuilding. The exceptions are the `NEXT_PUBLIC_*` ones noted below, which Next.js bakes in at build time. Edit `.env.local`:
 
 ```env
-# Required
+# Optional – overrides whatever the wizard writes
 JMAP_SERVER_URL=https://mail.example.com
-
-# Optional
 APP_NAME=My Webmail
 ```
 
@@ -132,13 +150,28 @@ PORT=3000
 
 ```env
 OAUTH_ENABLED=true
+OAUTH_ONLY=true                   # hide the username/password form entirely
 OAUTH_CLIENT_ID=webmail
 OAUTH_CLIENT_SECRET=              # optional, for confidential clients
 OAUTH_CLIENT_SECRET_FILE=         # path to a file containing the secret
 OAUTH_ISSUER_URL=                 # optional, for external IdPs
+OAUTH_AUTHORIZE_URL=              # override only the user-facing authorize endpoint
+OAUTH_ALLOW_PRIVATE_ENDPOINTS=    # allow discovery to resolve to RFC-1918 addresses
 ```
 
-Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.well-known/openid-configuration`.
+Endpoints are auto-discovered via `.well-known/oauth-authorization-server` or `.well-known/openid-configuration`. `OAUTH_ALLOW_PRIVATE_ENDPOINTS` is off by default as an SSRF guard. Enable it only for split-DNS deployments where the issuer's public hostname resolves to an internal IP.
+
+</details>
+
+<details>
+<summary>Anonymous telemetry</summary>
+
+```env
+BULWARK_TELEMETRY=on                 # opt-in; off by default
+TELEMETRY_DATA_DIR=./data/telemetry  # instance id and consent; mount a volume
+```
+
+Off unless you turn it on, in the admin UI, the installer, or here. Heartbeats carry version, platform, bucketed account counts, and feature toggles. No email addresses, hostnames, or IPs. Setting the variable (to either value) locks the choice and disables the admin toggle.
 
 </details>
 
@@ -190,6 +223,12 @@ LOGIN_COMPANY_NAME=My Company
 LOGIN_WEBSITE_URL=https://example.com
 LOGIN_IMPRINT_URL=https://example.com/imprint
 LOGIN_PRIVACY_POLICY_URL=https://example.com/privacy
+
+# Per-domain overrides (optional). When the webmail is served on multiple
+# hostnames, each host can override any subset of the branding fields above.
+# Match is on the request Host (or X-Forwarded-Host). Use "*.example.com" to
+# match any subdomain. Unset fields fall back to the global values.
+DOMAIN_BRANDING=[{"host":"maildomain1.com","loginCompanyName":"Company One","loginLogoLightUrl":"/branding/one.svg"},{"host":"maildomain2.com","loginCompanyName":"Company Two"}]
 ```
 
 </details>
@@ -217,33 +256,94 @@ LOG_LEVEL=info                       # error | warn | info | debug
 
 </details>
 
-## Keyboard Shortcuts
+<details>
+<summary>Admin data directories</summary>
 
-| Key           | Action                  |
-| ------------- | ----------------------- |
-| `j` / `k`     | Navigate between emails |
-| `Enter` / `o` | Open email              |
-| `Esc`         | Close / deselect        |
-| `c`           | Compose                 |
-| `r` / `R`     | Reply / Reply all       |
-| `f`           | Forward                 |
-| `s`           | Star                    |
-| `e`           | Archive                 |
-| `#`           | Delete                  |
-| `/`           | Search                  |
-| `?`           | Show all shortcuts      |
+```env
+ADMIN_CONFIG_DIR=./data/admin        # operator-authored: config.json, policy.json, plugins/, themes/
+ADMIN_STATE_DIR=./data/admin-state   # runtime: audit log, login timestamps, setup token
+ADMIN_CONFIG_READONLY=true           # enforce read-only mode at the app layer
+```
 
-## Tech Stack
+The split lets you mount the config volume read-only after the setup wizard completes. Legacy installs that pre-date the split keep working through `ADMIN_DATA_DIR`.
+
+</details>
+
+<details>
+<summary>Default UI locale</summary>
+
+The UI language follows each visitor's `Accept-Language` header and their stored preference. `NEXT_PUBLIC_DEFAULT_LOCALE` sets the fallback used when neither matches a supported locale (default `en`):
+
+```env
+NEXT_PUBLIC_DEFAULT_LOCALE=de
+```
+
+Supported: `ar`, `ca`, `cs`, `da`, `de`, `en`, `es`, `fa`, `fr`, `he`, `hu`, `it`, `ja`, `ko`, `lv`, `nl`, `pl`, `pt`, `ro`, `ru`, `sk`, `tr`, `uk`, `zh`. An unsupported value falls back to `en`.
+
+Like `NEXT_PUBLIC_BASE_PATH`, this is read at **build time**. To use it with the published Docker image, build your own:
+
+```bash
+docker build --build-arg NEXT_PUBLIC_DEFAULT_LOCALE=de -t bulwark-webmail .
+```
+
+</details>
+
+<details>
+<summary>Subpath / reverse proxy mount</summary>
+
+To serve the webmail at a subpath (e.g. `https://example.com/webmail`):
+
+```env
+NEXT_PUBLIC_BASE_PATH=/webmail
+NEXT_PUBLIC_LOCALE_PREFIX=always     # avoids next-intl rewrite loops
+```
+
+Unlike most other variables, `NEXT_PUBLIC_BASE_PATH` is read at **build time** because Next.js bakes it into emitted asset URLs. To use it with the published Docker image, build your own image with the variable set:
+
+```bash
+docker build --build-arg NEXT_PUBLIC_BASE_PATH=/webmail -t bulwark-webmail .
+```
+
+Then point your reverse proxy at the container without stripping the prefix. The app expects requests under `/webmail/...` and serves every route (`/webmail/api/...`, `/webmail/_next/static/...`, `/webmail/sw.js`, and so on) accordingly.
+
+</details>
+
+## Keyboard shortcuts
+
+| Key                  | Action                  |
+| -------------------- | ----------------------- |
+| `j` `↓` / `k` `↑`    | Navigate between emails |
+| `Enter` / `o`        | Open email              |
+| `Esc`                | Close / deselect        |
+| `x`                  | Expand / collapse thread |
+| `c`                  | Compose                 |
+| `r` / `R` `a`        | Reply / Reply all       |
+| `f`                  | Forward                 |
+| `s`                  | Star                    |
+| `e`                  | Archive                 |
+| `#` / `Del`          | Delete                  |
+| `u` / `Shift`+`I`    | Mark unread / read      |
+| `!`                  | Toggle spam             |
+| `Ctrl`+`A`           | Select all              |
+| `Shift`+`G`          | Refresh                 |
+| `/`                  | Search                  |
+| `?`                  | Show all shortcuts      |
+
+In the composer: `Ctrl/Cmd`+`Enter` sends, `Ctrl/Cmd`+`Shift`+`Enter` opens scheduled send, and `t` opens the template picker.
+
+## Tech stack
 
 |               |                                                   |
 | ------------- | ------------------------------------------------- |
-| **Framework** | [Next.js 16](https://nextjs.org/) with App Router |
+| **Framework** | [Next.js 16](https://nextjs.org/) with App Router, React 19 |
 | **Language**  | TypeScript                                        |
 | **Styling**   | [Tailwind CSS v4](https://tailwindcss.com/)       |
 | **State**     | [Zustand](https://zustand-demo.pmnd.rs/)          |
 | **Protocol**  | Custom JMAP client (RFC 8620)                     |
+| **Editor**    | [Tiptap](https://tiptap.dev/)                     |
 | **i18n**      | [next-intl](https://next-intl-docs.vercel.app/)   |
 | **Icons**     | [Lucide React](https://lucide.dev/)               |
+| **Testing**   | [Vitest](https://vitest.dev/) + [Playwright](https://playwright.dev/) |
 
 ## Why Stalwart?
 

VERSION

@@ -1 +1 @@
-1.5.2
+1.7.8

VNCMAIL-SETUP.md

@@ -0,0 +1,76 @@
+# VNCmail+ — setup & deploy runbook
+
+VNCmail+ is VNC's fork of [Bulwark](https://github.com/bulwarkmail/webmail), a
+Next.js (App Router) JMAP webmail client for **Stalwart**. Stalwart is the source
+of truth; VNCmail+ is the UI. It deploys as a **container on Kubernetes
+(microk8s)** at `vncmail.sandbox.vnc.de` — see **[deploy/k8s/](deploy/k8s/README.md)**.
+
+> **License:** AGPL-3.0. Serving a modified VNCmail+ to users over the network
+> obligates VNC to offer those users the corresponding source. Keeping this fork
+> public (with a "Source" link in the imprint/UI) satisfies that. Loop in legal
+> before a public/customer-facing launch if a closed fork is ever desired.
+
+## Architecture — why a container, not Vercel
+
+- Bulwark is a **stateful, long-lived server**: it persists settings-sync, admin
+  config/state, and telemetry to a **local data directory** (`/app/data/*`).
+- **Vercel serverless was tried and dropped** — its filesystem is read-only
+  except `/tmp`, so Bulwark's `mkdir ./data` crashes (`ENOENT /var/task/data`).
+  You cannot point its data dirs at a remote host either (they're POSIX paths,
+  not URLs). Bulwark's native model is a container + persistent volumes.
+- So VNCmail+ runs as a Docker image (`ghcr.io/brvncde-dotcom/vncmail-plus-*`)
+  with **4 persistent volumes**, exactly like the existing `bulwark.sandbox.vnc.de`.
+- JMAP calls go through **server-side `/api/*` routes** (`proxy.ts`) → server-to-
+  server to Stalwart, **no browser CORS**. Config is **runtime-read**.
+
+## Branches (dev-first)
+
+| Branch | Role |
+|--------|------|
+| `main` | **Production** — CI builds `…/vncmail-plus-beta`. Only updated by an explicit promote. |
+| `dev`  | Integration + QA — CI builds `…/vncmail-plus-dev` on push. Default working branch. |
+| `vnc/*`| Feature branches for UI work (branch off `dev`, PR into `dev`). |
+
+All VNC customization lives under `vnc/` (see `vnc/VNC-CHANGES.md`).
+
+## Deploy (Kubernetes / microk8s)
+
+Full runbook: **[deploy/k8s/README.md](deploy/k8s/README.md)**. In short:
+
+1. CI builds the image on push to `dev`/`main` → `ghcr.io/brvncde-dotcom/vncmail-plus-dev` (`.github/workflows/docker-publish.yml`).
+2. `kubectl apply` the manifests in `deploy/k8s/` (namespace, 4 PVCs, deployment, service, ingress) + a `secret.yaml` (from `secret.example.yaml`) + a `ghcr-pull` image-pull secret.
+3. Point `vncmail.sandbox.vnc.de` DNS at the ingress; cert-manager issues TLS.
+
+Runs alongside the existing `bulwark.sandbox.vnc.de`. Match your cluster's
+StorageClass / IngressClass / cert issuer to bulwark's (see the runbook).
+
+## Deploy workflow (dev-first — ALWAYS)
+
+Same flow as every other VNC/SRC repo:
+
+1. Work on `dev` (or `vnc/*` → PR into `dev`). Push to `dev` → CI builds the `-dev` image → `kubectl -n vncmail rollout restart deploy/vncmail-plus` to pull it. QA at `vncmail.sandbox.vnc.de`.
+2. **Promote to production only on explicit go-live** — merge `dev` → `main`:
+   ```bash
+   git log dev..main            # MUST be empty — main must have nothing dev lacks (else prod would revert)
+   git checkout main && git merge --ff-only dev
+   git push origin main         # CI builds the production image
+   git checkout dev
+   ```
+   Then roll the production deployment to the new image (pin its digest — see deploy/k8s/README.md).
+   Never push straight to `main`. Never let a dev→main merge silently revert prod.
+
+## Syncing upstream (Bulwark releases)
+
+Bring upstream into `dev` (NOT main), integrate + QA on the dev image, then promote as above:
+
+```bash
+git fetch upstream
+git checkout dev && git merge upstream/main    # resolve conflicts via vnc/VNC-CHANGES.md; QA on preview
+```
+
+## Auth
+
+Basic auth via Stalwart is the default — users sign in with their
+`@sandbox.vnc.de` address + password; VNCmail+ authenticates them over JMAP. No
+extra config. (SSO via vncdirectory/OIDC is a later option — see
+`vnc/vercel.env.template`.)

app/(main)/[...rest]/page.tsx

@@ -0,0 +1,10 @@
+import { notFound } from 'next/navigation';
+
+// Catch-all that anchors unmatched URLs into the (main) route group so
+// Next renders app/(main)/not-found.tsx (wrapped by (main)/layout.tsx)
+// instead of the built-in __next_builtin__not-found page. Without this,
+// route groups can't pick a root layout for URLs that match nothing, so
+// 404s render bare.
+export default function CatchAll() {
+  notFound();
+}

app/(main)/[locale]/auth/callback/page.tsx

@@ -4,7 +4,7 @@ import { Suspense, useEffect, useState } from "react";
 import { useRouter, useSearchParams } from "next/navigation";
 import { useTranslations } from "next-intl";
 import { useAuthStore } from "@/stores/auth-store";
-import { getPathPrefix } from "@/lib/browser-navigation";
+import { apiFetch, getPathPrefix, toRouterPath } from "@/lib/browser-navigation";
 import { Loader2, AlertCircle } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { useParams } from "next/navigation";
@@ -32,6 +32,42 @@ function OAuthCallbackInner() {
       return;
     }
 
+    // Step-up re-auth for device pairing: the QR generator sent the user here
+    // via prompt=login. Don't create a login session — just confirm the fresh
+    // auth (sets the short-lived pairing proof cookie) and bounce back to the
+    // Security settings, where the QR generation auto-resumes.
+    let pairReauthResume = false;
+    try {
+      pairReauthResume = sessionStorage.getItem("pair_reauth_resume") === "1";
+    } catch { /* sessionStorage unavailable */ }
+    if (pairReauthResume && state) {
+      try { sessionStorage.removeItem("pair_reauth_resume"); } catch { /* ignore */ }
+      (async () => {
+        try {
+          const res = await apiFetch("/api/auth/reauth/sso/complete", {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            credentials: "include",
+            body: JSON.stringify({ code, state }),
+          });
+          if (!res.ok) {
+            setError("token_exchange_failed");
+            return;
+          }
+          try {
+            sessionStorage.setItem("pair_reauth_done", "1");
+            // Land back on the Security tab (readPersistedTab reads this key).
+            sessionStorage.setItem("settings-deep-link-tab", "security");
+          } catch { /* ignore */ }
+          const prefix = getPathPrefix(params.locale as string);
+          router.push(toRouterPath(`${prefix}/${params.locale}/settings`));
+        } catch {
+          setError("token_exchange_failed");
+        }
+      })();
+      return;
+    }
+
     const savedState = sessionStorage.getItem("oauth_state");
 
     if (savedState) {
@@ -43,6 +79,7 @@ function OAuthCallbackInner() {
 
       const codeVerifier = sessionStorage.getItem("oauth_code_verifier");
       const serverUrl = sessionStorage.getItem("oauth_server_url");
+      const serverId = sessionStorage.getItem("oauth_server_id") || undefined;
 
       if (!codeVerifier || !serverUrl) {
         setError("missing_params");
@@ -52,12 +89,13 @@ function OAuthCallbackInner() {
       const prefix = getPathPrefix(params.locale as string);
       const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
 
-      loginWithOAuth(serverUrl, code, codeVerifier, redirectUri)
+      loginWithOAuth(serverUrl, code, codeVerifier, redirectUri, serverId)
         .then((success) => {
           if (success) {
             sessionStorage.removeItem("oauth_state");
             sessionStorage.removeItem("oauth_code_verifier");
             sessionStorage.removeItem("oauth_server_url");
+            sessionStorage.removeItem("oauth_server_id");
             sessionStorage.removeItem("oauth_add_account_mode");
             let redirectTo = `${prefix}/${params.locale}`;
             try {
@@ -67,7 +105,7 @@ function OAuthCallbackInner() {
                 redirectTo = saved;
               }
             } catch { /* sessionStorage may be unavailable */ }
-            router.push(redirectTo);
+            router.push(toRouterPath(redirectTo));
           } else {
             setError("token_exchange_failed");
           }
@@ -76,7 +114,69 @@ function OAuthCallbackInner() {
           setError("token_exchange_failed");
         });
     } else if (state) {
-      // Server-side SSO flow - state was stored in encrypted httpOnly cookie
+      // Server-side SSO flow - state was stored in encrypted httpOnly cookie.
+      // Branch on mobile handoff first: the login page left a marker in
+      // sessionStorage if it kicked this OAuth dance off for the mobile app.
+      let mobileRedirectUri: string | null = null;
+      let mobileState: string | null = null;
+      try {
+        mobileRedirectUri = sessionStorage.getItem("mobile_redirect_uri");
+        mobileState = sessionStorage.getItem("mobile_state");
+      } catch { /* sessionStorage may be unavailable */ }
+
+      if (mobileRedirectUri && mobileRedirectUri.startsWith("bulwarkmobile://")) {
+        // Drive /api/auth/sso/complete directly so we can read the tokens
+        // out of the response - loginWithServerSso would consume them and
+        // wire up the webmail auth store, which isn't useful here. The
+        // server's mobile-flow branch (keyed on the pending cookie) skips
+        // the refresh-token cookie write for the same reason.
+        (async () => {
+          try {
+            const res = await apiFetch("/api/auth/sso/complete", {
+              method: "POST",
+              headers: { "Content-Type": "application/json" },
+              credentials: "include",
+              body: JSON.stringify({ code, state }),
+            });
+            if (!res.ok) {
+              setError("token_exchange_failed");
+              return;
+            }
+            const data = await res.json();
+            const serverUrl = data.server_url as string | undefined;
+            const accessToken = data.access_token as string | undefined;
+            const tokenEndpoint = data.token_endpoint as string | undefined;
+            const clientId = data.client_id as string | undefined;
+            if (!serverUrl || !accessToken || !tokenEndpoint || !clientId) {
+              setError("token_exchange_failed");
+              return;
+            }
+            const fragment = new URLSearchParams({
+              flow: "oauth",
+              server_url: serverUrl,
+              access_token: accessToken,
+              token_endpoint: tokenEndpoint,
+              client_id: clientId,
+              state: mobileState ?? "",
+            });
+            if (typeof data.refresh_token === "string") {
+              fragment.set("refresh_token", data.refresh_token);
+            }
+            if (typeof data.expires_in === "number") {
+              fragment.set("expires_in", String(data.expires_in));
+            }
+            try {
+              sessionStorage.removeItem("mobile_redirect_uri");
+              sessionStorage.removeItem("mobile_state");
+            } catch { /* ignore */ }
+            window.location.replace(`${mobileRedirectUri}#${fragment.toString()}`);
+          } catch {
+            setError("token_exchange_failed");
+          }
+        })();
+        return;
+      }
+
       const ssoPrefix = getPathPrefix(params.locale as string);
       loginWithServerSso(code, state)
         .then((success) => {
@@ -89,7 +189,7 @@ function OAuthCallbackInner() {
                 redirectTo = saved;
               }
             } catch { /* sessionStorage may be unavailable */ }
-            router.push(redirectTo);
+            router.push(toRouterPath(redirectTo));
           } else {
             setError("token_exchange_failed");
           }
@@ -117,7 +217,7 @@ function OAuthCallbackInner() {
           </p>
           <Button
             variant="outline"
-            onClick={() => router.push(`${getPathPrefix(params.locale as string)}/${params.locale}/login`)}
+            onClick={() => router.push(toRouterPath(`${getPathPrefix(params.locale as string)}/${params.locale}/login`))}
           >
             {t("oauth_error.back_to_login")}
           </Button>

app/(main)/[locale]/calendar/page.tsx

@@ -15,8 +15,10 @@ import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
 import { useSettingsStore } from "@/stores/settings-store";
 import { useIdentityStore } from "@/stores/identity-store";
+import { useAccountStore } from "@/stores/account-store";
+import { usePolicyStore } from "@/stores/policy-store";
 import { toast } from "@/stores/toast-store";
-import { useIsMobile } from "@/hooks/use-media-query";
+import { useIsDesktop, useIsMobile } from "@/hooks/use-media-query";
 import { Button } from "@/components/ui/button";
 import { CalendarToolbar } from "@/components/calendar/calendar-toolbar";
 import { CalendarMonthView } from "@/components/calendar/calendar-month-view";
@@ -31,16 +33,21 @@ import { CalendarSidebarPanel } from "@/components/calendar/calendar-sidebar-pan
 import { EventModal, type PendingEventPreview } from "@/components/calendar/event-modal";
 import { EventDetailPopover } from "@/components/calendar/event-detail-popover";
 import { EventContextMenu } from "@/components/calendar/event-context-menu";
+import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
+import { EmptySpaceContextMenu } from "@/components/calendar/empty-space-context-menu";
 import { useContextMenu } from "@/hooks/use-context-menu";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
 import { downloadEventICS } from "@/lib/calendar-ics-export";
 import { ICalImportModal } from "@/components/calendar/ical-import-modal";
 import { ICalSubscriptionModal } from "@/components/calendar/ical-subscription-modal";
+import { ProtocolAccountPicker } from "@/components/protocol/protocol-account-picker";
 import { RecurrenceScopeDialog, type RecurrenceEditScope } from "@/components/calendar/recurrence-scope-dialog";
 import { NavigationRail } from "@/components/layout/navigation-rail";
 import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useIsEmbedded } from "@/hooks/use-is-embedded";
+import { useProMultiAccountCalendars } from "@/hooks/use-pro-multi-account-calendars";
 import { ResizeHandle } from "@/components/layout/resize-handle";
 import { sanitizeOutgoingCalendarEventData } from "@/lib/calendar-event-normalization";
 import { getEventStartDate } from "@/lib/calendar-utils";
@@ -54,7 +61,10 @@ import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
 import { CreateCalendarModal } from "@/components/calendar/create-calendar-modal";
 import { getUserParticipantId } from "@/lib/calendar-participants";
 import { generateBirthdayEvents, createBirthdayCalendar, BIRTHDAY_CALENDAR_ID } from "@/lib/birthday-calendar";
+import { sharedCalendarColorKey, pickUnusedCalendarColor } from "@/lib/shared-calendar-colors";
 import { debug } from "@/lib/debug";
+import { consumePendingWebcal, hasPendingWebcal, subscribeToPendingWebcal } from "@/lib/protocol-handlers/session";
+import type { ParsedWebcal } from "@/lib/protocol-handlers/webcal";
 
 type PendingScopeAction =
   | { type: "edit"; event: CalendarEvent; updates: Partial<CalendarEvent>; sendScheduling?: boolean }
@@ -67,9 +77,17 @@ function isRecurringEvent(event: CalendarEvent): boolean {
 export default function CalendarPage() {
   const router = useRouter();
   const t = useTranslations("calendar");
+  const tWebcalAction = useTranslations("calendar.webcal_action");
   const isMobile = useIsMobile();
+  const isDesktop = useIsDesktop();
+  const isEmbedded = useIsEmbedded();
+  // When the pane (Pro shell) or window is narrower than `lg`, the sidebar
+  // collapses into a burger-toggled overlay instead of taking inline space.
+  const isNarrow = !isDesktop;
+  const [narrowSidebarOpen, setNarrowSidebarOpen] = useState(false);
+  useEffect(() => { if (!isNarrow) setNarrowSidebarOpen(false); }, [isNarrow]);
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
-  const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
+  const { client, isAuthenticated, logout, checkAuth, switchAccount, activeAccountId, isLoading: authLoading } = useAuthStore();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
   const { quota, isPushConnected } = useEmailStore();
   const {
@@ -80,7 +98,11 @@ export default function CalendarPage() {
     removeCalendar, clearCalendarEvents,
     refreshAllSubscriptions, icalSubscriptions,
   } = useCalendarStore();
+  const calendarEnabled = usePolicyStore((s) => s.isFeatureEnabled('calendarEnabled'));
   const { firstDayOfWeek, timeFormat, showWeekNumbers, enableCalendarTasks, showTasksOnCalendar, calendarHoverPreview, showBirthdayCalendar, birthdayCalendarColor, updateSetting } = useSettingsStore();
+  const sharedCalendarColors = useSettingsStore((s) => s.sharedCalendarColors);
+  const setSharedCalendarColor = useSettingsStore((s) => s.setSharedCalendarColor);
+  const removeSharedCalendarColor = useSettingsStore((s) => s.removeSharedCalendarColor);
   const taskStore = useTaskStore();
   const fetchTasksFn = useTaskStore(state => state.fetchTasks);
   const { identities } = useIdentityStore();
@@ -95,6 +117,10 @@ export default function CalendarPage() {
   const [showEventModal, setShowEventModal] = useState(false);
   const [showImportModal, setShowImportModal] = useState(false);
   const [showSubscriptionModal, setShowSubscriptionModal] = useState(false);
+  const [pendingSubscription, setPendingSubscription] = useState<{ url: string; name: string } | null>(null);
+  const [showWebcalActionChoice, setShowWebcalActionChoice] = useState(false);
+  const [pendingWebcalAccountChoice, setPendingWebcalAccountChoice] = useState<ParsedWebcal | null>(null);
+  const [isProtocolAccountSwitching, setIsProtocolAccountSwitching] = useState(false);
   const [editingSubscription, setEditingSubscription] = useState<string | null>(null);
   const [sharingCalendarId, setSharingCalendarId] = useState<string | null>(null);
   const [defaultCalendarIdForCreate, setDefaultCalendarIdForCreate] = useState<string | undefined>(undefined);
@@ -104,6 +130,7 @@ export default function CalendarPage() {
   const [editEvent, setEditEvent] = useState<CalendarEvent | null>(null);
   const [defaultModalDate, setDefaultModalDate] = useState<Date | undefined>();
   const [defaultModalEndDate, setDefaultModalEndDate] = useState<Date | undefined>();
+  const [defaultModalAllDay, setDefaultModalAllDay] = useState(false);
   const [miniMonth, setMiniMonth] = useState(new Date());
   const [pendingScopeAction, setPendingScopeAction] = useState<PendingScopeAction | null>(null);
   const [detailEvent, setDetailEvent] = useState<CalendarEvent | null>(null);
@@ -154,10 +181,13 @@ export default function CalendarPage() {
     if (initialCheckDone && !isAuthenticated && !authLoading) {
       try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
       redirectToLogin();
-    } else if (client && !supportsCalendar) {
+    } else if (client && !calendarEnabled) {
+      // Calendar disabled by admin policy - send the user back to mail.
+      router.push("/");
+    } else if (client && !supportsCalendar && !pendingWebcalAccountChoice && !isProtocolAccountSwitching && !pendingSubscription && !showWebcalActionChoice && !hasPendingWebcal()) {
       router.push("/");
     }
-  }, [initialCheckDone, isAuthenticated, authLoading, client, supportsCalendar, router]);
+  }, [initialCheckDone, isAuthenticated, authLoading, client, calendarEnabled, supportsCalendar, pendingWebcalAccountChoice, isProtocolAccountSwitching, pendingSubscription, showWebcalActionChoice, router]);
 
   useEffect(() => {
     if (error) {
@@ -165,12 +195,95 @@ export default function CalendarPage() {
     }
   }, [error]);
 
+  const getWebcalProtocolAccounts = useCallback(() => {
+    const connectedClients = useAuthStore.getState().getAllConnectedClients();
+    return useAccountStore.getState().accounts.filter((account) => {
+      if (!account.isConnected) return false;
+      return connectedClients.get(account.id)?.supportsCalendars() === true;
+    });
+  }, []);
+
+  const openWebcalForAccount = useCallback(async (pending: ParsedWebcal, accountId: string) => {
+    setIsProtocolAccountSwitching(true);
+    try {
+      if (useAuthStore.getState().activeAccountId !== accountId) {
+        await switchAccount(accountId);
+      }
+      setPendingWebcalAccountChoice(null);
+      setPendingSubscription({
+        url: pending.subscriptionUrl,
+        name: pending.suggestedName,
+      });
+      setShowWebcalActionChoice(true);
+    } finally {
+      setIsProtocolAccountSwitching(false);
+    }
+  }, [switchAccount]);
+
+  const handleWebcalProtocolRequest = useCallback((pending: ParsedWebcal) => {
+    const protocolAccounts = getWebcalProtocolAccounts();
+    if (protocolAccounts.length > 1) {
+      setPendingWebcalAccountChoice(pending);
+      return;
+    }
+
+    if (protocolAccounts.length === 0 && !supportsCalendar) {
+      return;
+    }
+
+    const accountId = protocolAccounts[0]?.id ?? activeAccountId;
+    if (accountId) {
+      void openWebcalForAccount(pending, accountId);
+      return;
+    }
+
+    setPendingSubscription({
+      url: pending.subscriptionUrl,
+      name: pending.suggestedName,
+    });
+    setShowWebcalActionChoice(true);
+  }, [activeAccountId, getWebcalProtocolAccounts, openWebcalForAccount, supportsCalendar]);
+
+  const closeWebcalActionChoice = useCallback(() => {
+    setShowWebcalActionChoice(false);
+    setPendingSubscription(null);
+  }, []);
+
+  const handleImportWebcal = useCallback(() => {
+    setShowWebcalActionChoice(false);
+    setShowImportModal(true);
+  }, []);
+
+  const handleSubscribeWebcal = useCallback(() => {
+    setShowWebcalActionChoice(false);
+    setShowSubscriptionModal(true);
+  }, []);
+
   useEffect(() => {
+    if (!isAuthenticated || !client) return;
+
+    const openPendingWebcal = () => {
+      const pending = consumePendingWebcal();
+      if (!pending) return;
+
+      handleWebcalProtocolRequest(pending);
+    };
+
+    openPendingWebcal();
+    return subscribeToPendingWebcal(openPendingWebcal);
+  }, [isAuthenticated, client, handleWebcalProtocolRequest]);
+
+  // Single-account fetch path. The Pro shell aggregates calendars from
+  // every connected account via [[useProMultiAccountCalendars]] below, so
+  // skip this fetch there to avoid clobbering the merged list with the
+  // active client's calendars only.
+  useEffect(() => {
+    if (isEmbedded) return;
     if (client && !hasFetched.current) {
       hasFetched.current = true;
       fetchCalendars(client);
     }
-  }, [client, fetchCalendars]);
+  }, [client, fetchCalendars, isEmbedded]);
 
   // Auto-refresh iCal subscriptions
   useEffect(() => {
@@ -239,10 +352,21 @@ export default function CalendarPage() {
   }, [client, enableCalendarTasks, normalizedViewMode, showTasksOnCalendar, fetchTasksFn]);
 
   useEffect(() => {
+    if (isEmbedded) return;
     if (client && calendars.length > 0 && dateRange) {
       fetchEvents(client, dateRange.start, dateRange.end);
     }
-  }, [client, calendars.length, dateRange, fetchEvents]);
+  }, [client, calendars.length, dateRange, fetchEvents, isEmbedded]);
+
+  // Pro shell only: aggregate calendars and events from every connected
+  // account so the sidebar lists them all (and the views render their
+  // events together). The hook is a no-op outside the embedded shell.
+  const { enabled: multiAccountEnabled, accountClients } = useProMultiAccountCalendars(
+    isEmbedded ? dateRange?.start ?? null : null,
+    isEmbedded ? dateRange?.end ?? null : null,
+  );
+  const fetchAllAccountsCalendarsFn = useCalendarStore((s) => s.fetchAllAccountsCalendars);
+  const fetchAllAccountsEventsFn = useCalendarStore((s) => s.fetchAllAccountsEvents);
 
   const navigatePrev = useCallback(() => {
     let next: Date;
@@ -314,6 +438,8 @@ export default function CalendarPage() {
       setMobileReturnToMonth(true);
       setViewMode("day");
     }
+    // Close the narrow-pane sidebar overlay after the user picks a date.
+    setNarrowSidebarOpen(false);
   }, [setSelectedDate, isMobile, normalizedViewMode, setViewMode]);
 
   const navigateBackToMonth = useCallback(() => {
@@ -326,11 +452,12 @@ export default function CalendarPage() {
     setSelectedDate(date);
   }, [setSelectedDate]);
 
-  const openCreateModal = useCallback((date?: Date, endDate?: Date) => {
+  const openCreateModal = useCallback((date?: Date, endDate?: Date, allDay?: boolean) => {
     setEditEvent(null);
     const d = date || selectedDate;
     setDefaultModalDate(d);
     setDefaultModalEndDate(endDate);
+    setDefaultModalAllDay(allDay ?? false);
     setSelectedDate(d);
     setShowEventModal(true);
   }, [selectedDate, setSelectedDate]);
@@ -395,6 +522,21 @@ export default function CalendarPage() {
     openEventContextMenu(e, event);
   }, [closeDetail, openEventContextMenu]);
 
+  const {
+    contextMenu: emptyContextMenu,
+    openContextMenu: openEmptyContextMenu,
+    closeContextMenu: closeEmptyContextMenu,
+    menuRef: emptyContextMenuRef,
+  } = useContextMenu<{ date: Date; hour?: number; allDayArea?: boolean }>();
+
+  const handleContextMenuEmpty = useCallback(
+    (e: React.MouseEvent, date: Date, hour?: number, allDayArea?: boolean) => {
+      closeDetail();
+      openEmptyContextMenu(e, { date, hour, allDayArea });
+    },
+    [closeDetail, openEmptyContextMenu],
+  );
+
   const handleHoverEvent = useCallback((event: CalendarEvent, anchorRect: DOMRect) => {
     if (isMobile) return;
     if (calendarHoverPreview === 'off') return;
@@ -448,12 +590,15 @@ export default function CalendarPage() {
   }, [events, client]);
 
   const refetchCurrentRange = useCallback(async () => {
-    if (!client) return;
+    if (!client || !activeAccountId) return;
     const { dateRange: currentRange } = useCalendarStore.getState();
-    if (currentRange) {
-      await fetchEvents(client, currentRange.start, currentRange.end);
+    if (!currentRange) return;
+    if (multiAccountEnabled && accountClients.length > 0) {
+      await fetchAllAccountsEventsFn(accountClients, activeAccountId, currentRange.start, currentRange.end);
+      return;
     }
-  }, [client, fetchEvents]);
+    await fetchEvents(client, currentRange.start, currentRange.end);
+  }, [client, fetchEvents, multiAccountEnabled, accountClients, activeAccountId, fetchAllAccountsEventsFn]);
 
   // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
   // and refresh calendar data via JMAP instead of reloading the page.
@@ -461,8 +606,11 @@ export default function CalendarPage() {
     enabled: isAuthenticated && !!client,
     onRefresh: async () => {
       if (!client) return;
+      const calendarRefresh = multiAccountEnabled && accountClients.length > 0 && activeAccountId
+        ? fetchAllAccountsCalendarsFn(accountClients, activeAccountId)
+        : fetchCalendars(client);
       await Promise.all([
-        fetchCalendars(client),
+        calendarRefresh,
         refetchCurrentRange(),
         refreshAllSubscriptions(client),
       ]);
@@ -891,10 +1039,47 @@ export default function CalendarPage() {
     try { return t('birthday_calendar'); } catch { return 'Birthdays'; }
   })();
 
+  // Apply each shared calendar's local color override (per-viewer recolor,
+  // #345). The override replaces the calendar's color and wins over per-event
+  // colors via the `colorIsLocalOverride` flag (see getEventColor). Personal
+  // calendars are passed through untouched.
+  const displayCalendars = useMemo(() => {
+    return calendars.map((cal) => {
+      if (!cal.isShared) return cal;
+      const override = sharedCalendarColors[sharedCalendarColorKey(cal)];
+      if (!override) return cal;
+      return { ...cal, color: override, colorIsLocalOverride: true };
+    });
+  }, [calendars, sharedCalendarColors]);
+
+  // Auto-assign a random, not-yet-used palette color to any freshly shared
+  // calendar so multiple shared calendars don't collide on one color. Runs
+  // once per calendar (guarded by the presence of an existing key), and the
+  // user can still overwrite it from the sidebar.
+  useEffect(() => {
+    const shared = calendars.filter((c) => c.isShared);
+    const missing = shared.filter((c) => !sharedCalendarColors[sharedCalendarColorKey(c)]);
+    if (missing.length === 0) return;
+    // Seed "used" with personal calendar colors plus already-assigned shared
+    // overrides so the picks stay distinct from what's already on screen.
+    const used = new Set<string>();
+    for (const c of calendars) {
+      if (!c.isShared && c.color) used.add(c.color.toLowerCase());
+    }
+    for (const color of Object.values(sharedCalendarColors)) {
+      if (color) used.add(color.toLowerCase());
+    }
+    for (const cal of missing) {
+      const color = pickUnusedCalendarColor(used);
+      used.add(color.toLowerCase());
+      setSharedCalendarColor(sharedCalendarColorKey(cal), color);
+    }
+  }, [calendars, sharedCalendarColors, setSharedCalendarColor]);
+
   const allCalendars = useMemo(() => {
-    if (!showBirthdayCalendar) return calendars;
-    return [...calendars, createBirthdayCalendar(birthdayCalendarName, birthdayCalendarColor)];
-  }, [calendars, showBirthdayCalendar, birthdayCalendarName, birthdayCalendarColor]);
+    if (!showBirthdayCalendar) return displayCalendars;
+    return [...displayCalendars, createBirthdayCalendar(birthdayCalendarName, birthdayCalendarColor)];
+  }, [displayCalendars, showBirthdayCalendar, birthdayCalendarName, birthdayCalendarColor]);
 
   const visibleEvents = useMemo(() => {
     const filtered = events.filter((e) => {
@@ -937,7 +1122,55 @@ export default function CalendarPage() {
     });
   }, [events, selectedCalendarIds, visibleEvents]);
 
-  if (!isAuthenticated || !supportsCalendar) return null;
+  const renderWebcalAccountPicker = () => pendingWebcalAccountChoice ? (
+    <ProtocolAccountPicker
+      kind="webcal"
+      operation={pendingWebcalAccountChoice}
+      accounts={getWebcalProtocolAccounts()}
+      activeAccountId={activeAccountId}
+      isSwitching={isProtocolAccountSwitching}
+      onSelect={(accountId) => void openWebcalForAccount(pendingWebcalAccountChoice, accountId)}
+      onCancel={() => setPendingWebcalAccountChoice(null)}
+    />
+  ) : null;
+
+  const renderWebcalActionChoice = () => showWebcalActionChoice && pendingSubscription ? (
+    <div className="fixed inset-0 z-50 flex items-center justify-center">
+      <div className="absolute inset-0 bg-black/50 backdrop-blur-[1px]" onClick={closeWebcalActionChoice} aria-hidden="true" />
+      <div
+        role="dialog"
+        aria-modal="true"
+        aria-label={tWebcalAction("title")}
+        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-md mx-4 animate-in zoom-in-95 duration-200"
+      >
+        <div className="px-6 py-4 border-b border-border">
+          <h2 className="text-lg font-semibold">{tWebcalAction("title")}</h2>
+          <p className="text-sm text-muted-foreground mt-1">{tWebcalAction("description", { name: pendingSubscription.name })}</p>
+        </div>
+        <div className="px-6 py-4 space-y-3">
+          <Button variant="outline" className="w-full justify-start h-auto py-3" onClick={handleImportWebcal}>
+            <span className="text-start">
+              <span className="block font-medium">{tWebcalAction("import_title")}</span>
+              <span className="block text-xs text-muted-foreground mt-0.5">{tWebcalAction("import_description")}</span>
+            </span>
+          </Button>
+          <Button variant="outline" className="w-full justify-start h-auto py-3" onClick={handleSubscribeWebcal}>
+            <span className="text-start">
+              <span className="block font-medium">{tWebcalAction("subscribe_title")}</span>
+              <span className="block text-xs text-muted-foreground mt-0.5">{tWebcalAction("subscribe_description")}</span>
+            </span>
+          </Button>
+        </div>
+        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
+          <Button variant="ghost" onClick={closeWebcalActionChoice}>{tWebcalAction("cancel")}</Button>
+        </div>
+      </div>
+    </div>
+  ) : null;
+
+  if (!isAuthenticated) return null;
+  if (!calendarEnabled) return null;
+  if (!supportsCalendar) return renderWebcalAccountPicker();
 
   const renderView = () => {
     if (isLoading && calendars.length === 0) {
@@ -961,6 +1194,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               firstDayOfWeek={firstDayOfWeek}
               isMobile={isMobile}
@@ -978,6 +1212,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               firstDayOfWeek={firstDayOfWeek}
               timeFormat={timeFormat}
@@ -997,6 +1232,7 @@ export default function CalendarPage() {
               onHoverEvent={handleHoverEvent}
               onHoverLeave={handleHoverLeave}
               onContextMenuEvent={handleContextMenuEvent}
+              onContextMenuEmpty={handleContextMenuEmpty}
               onCreateAtTime={openCreateModal}
               timeFormat={timeFormat}
               isMobile={isMobile}
@@ -1030,7 +1266,7 @@ export default function CalendarPage() {
               />
               <TaskListView
                 tasks={taskStore.tasks}
-                calendars={calendars}
+                calendars={displayCalendars}
                 selectedCalendarIds={selectedCalendarIds}
                 filter={taskStore.filter}
                 showCompleted={taskStore.showCompleted}
@@ -1061,9 +1297,11 @@ export default function CalendarPage() {
   };
 
   return (
-    <div className={cn("flex h-dvh bg-background overflow-hidden", isMobile && "flex-col")}>
-      {/* Left Navigation Rail */}
-      {!isMobile && (
+    <div className={cn("flex flex-col bg-background overflow-hidden pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className={cn("relative flex flex-1 min-h-0 overflow-hidden", isMobile && "flex-col")}>
+      {/* Left Navigation Rail (hidden when embedded in Pro shell) */}
+      {!isMobile && !isEmbedded && (
         <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
           <NavigationRail
             collapsed
@@ -1082,15 +1320,31 @@ export default function CalendarPage() {
         <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} className="flex-1" />
       )}
 
-      {/* Sidebar - full height */}
-      {!isMobile && !inlineApp && (
+      {/* Narrow-pane backdrop: dim and close overlay sidebar */}
+      {isNarrow && narrowSidebarOpen && !inlineApp && (
+        <div
+          className={cn(
+            "inset-0 bg-black/50 z-40",
+            isEmbedded ? "absolute" : "fixed"
+          )}
+          onClick={() => setNarrowSidebarOpen(false)}
+        />
+      )}
+
+      {/* Sidebar - in-flow when desktop pane, overlay when narrow */}
+      {!inlineApp && (
         <>
           <div
             className={cn(
-              "border-r border-border bg-secondary overflow-y-auto flex-shrink-0 p-3",
-              !isResizing && "transition-[width] duration-300"
+              "border-e border-border bg-secondary overflow-y-auto flex-shrink-0 p-3",
+              !isResizing && "transition-[width] duration-300",
+              isNarrow && cn(
+                "absolute inset-y-0 left-0 z-50 w-72 pt-[env(safe-area-inset-top)]",
+                "transform transition-transform duration-300 ease-in-out",
+                !narrowSidebarOpen && "-translate-x-full"
+              )
             )}
-            style={{ width: `${calSidebarWidth}px` }}
+            style={isNarrow ? undefined : { width: `${calSidebarWidth}px` }}
           >
             <MiniCalendar
               selectedDate={selectedDate}
@@ -1110,8 +1364,21 @@ export default function CalendarPage() {
                   updateSetting('birthdayCalendarColor', color);
                   return;
                 }
+                // Shared calendars: recolor locally only (the viewer usually
+                // can't write the owner's calendar, and it'd recolor it for
+                // everyone). Personal calendars write through to the server.
+                const cal = allCalendars.find((c) => c.id === calendarId);
+                if (cal?.isShared) {
+                  setSharedCalendarColor(sharedCalendarColorKey(cal), color);
+                  return;
+                }
                 updateCalendar(client, calendarId, { color });
               } : undefined}
+              onResetColor={(cal) => {
+                // Drop the local override; the auto-assign effect picks a
+                // fresh unused color (so it never reverts to a collision).
+                removeSharedCalendarColor(sharedCalendarColorKey(cal));
+              }}
               onShareCalendar={client ? (cal) => setSharingCalendarId(cal.id) : undefined}
               onCreateEvent={(cal: Calendar) => {
                 setDefaultCalendarIdForCreate(cal.id);
@@ -1151,17 +1418,20 @@ export default function CalendarPage() {
               onSubscribe={() => setShowSubscriptionModal(true)}
               onEditSubscription={(subId) => setEditingSubscription(subId)}
               client={client}
+              multiAccountMode={multiAccountEnabled && accountClients.length > 1}
             />
           </div>
-          <ResizeHandle
-            onResizeStart={() => { dragStartWidth.current = calSidebarWidth; setIsResizing(true); }}
-            onResize={(delta) => setCalSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
-            onResizeEnd={() => {
-              setIsResizing(false);
-              localStorage.setItem("calendar-sidebar-width", String(calSidebarWidth));
-            }}
-            onDoubleClick={() => { setCalSidebarWidth(256); localStorage.setItem("calendar-sidebar-width", "256"); }}
-          />
+          {!isNarrow && (
+            <ResizeHandle
+              onResizeStart={() => { dragStartWidth.current = calSidebarWidth; setIsResizing(true); }}
+              onResize={(delta) => setCalSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
+              onResizeEnd={() => {
+                setIsResizing(false);
+                localStorage.setItem("calendar-sidebar-width", String(calSidebarWidth));
+              }}
+              onDoubleClick={() => { setCalSidebarWidth(256); localStorage.setItem("calendar-sidebar-width", "256"); }}
+            />
+          )}
         </>
       )}
 
@@ -1179,10 +1449,11 @@ export default function CalendarPage() {
           onSubscribe={() => setShowSubscriptionModal(true)}
           isMobile={isMobile}
           onNavigateBack={isMobile && mobileReturnToMonth && normalizedViewMode === "day" ? navigateBackToMonth : undefined}
-          calendars={calendars}
+          calendars={displayCalendars}
           selectedCalendarIds={selectedCalendarIds}
           onToggleVisibility={toggleCalendarVisibility}
           enableCalendarTasks={enableCalendarTasks}
+          onMenuClick={isNarrow ? () => setNarrowSidebarOpen(true) : undefined}
         />
 
         <div
@@ -1204,19 +1475,20 @@ export default function CalendarPage() {
 
           {/* Desktop event panel */}
           {!isMobile && showEventModal && (
-            <div className="w-[400px] border-l border-border flex-shrink-0 overflow-hidden">
+            <div className="w-[400px] border-s border-border flex-shrink-0 overflow-hidden">
               <EventModal
                 key={editEvent?.id ?? 'new'}
                 event={editEvent}
-                calendars={calendars}
+                calendars={displayCalendars}
                 defaultDate={defaultModalDate}
                 defaultEndDate={defaultModalEndDate}
+                defaultAllDay={defaultModalAllDay}
                 defaultCalendarId={defaultCalendarIdForCreate}
                 onSave={handleSaveEvent}
                 onDelete={handleDeleteEvent}
                 onDuplicate={handleDuplicateEvent}
                 onRsvp={handleRsvp}
-                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); setDefaultCalendarIdForCreate(undefined); }}
+                onClose={() => { setShowEventModal(false); setEditEvent(null); setPendingPreview(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
                 onPreviewChange={setPendingPreview}
                 currentUserEmails={currentUserEmails}
                 isMobile={false}
@@ -1226,11 +1498,11 @@ export default function CalendarPage() {
 
           {/* Desktop task panel */}
           {!isMobile && showTaskModal && (
-            <div className="w-[400px] border-l border-border flex-shrink-0 overflow-hidden">
+            <div className="w-[400px] border-s border-border flex-shrink-0 overflow-hidden">
               <TaskModal
                 key={editTask?.id ?? 'new-task'}
                 task={editTask}
-                calendars={calendars}
+                calendars={displayCalendars}
                 onSave={handleSaveTask}
                 onDelete={handleDeleteTask}
                 onClose={() => { setShowTaskModal(false); setEditTask(null); }}
@@ -1254,7 +1526,7 @@ export default function CalendarPage() {
       )}
 
       {/* Mobile Bottom Navigation */}
-      {isMobile && (
+      {isMobile && !isEmbedded && (
         <div className="shrink-0">
           <NavigationRail
             orientation="horizontal"
@@ -1282,10 +1554,42 @@ export default function CalendarPage() {
         />
       )}
 
+      {emptyContextMenu.data && (() => {
+        const { date, hour } = emptyContextMenu.data;
+        return (
+          <EmptySpaceContextMenu
+            position={emptyContextMenu.position}
+            isOpen={emptyContextMenu.isOpen}
+            onClose={closeEmptyContextMenu}
+            menuRef={emptyContextMenuRef}
+            onNewEvent={() => {
+              const d = new Date(date);
+              if (typeof hour === "number") {
+                d.setHours(hour, 0, 0, 0);
+              } else {
+                const now = new Date();
+                d.setHours(now.getHours() + 1, 0, 0, 0);
+              }
+              openCreateModal(d);
+            }}
+            onNewAllDayEvent={() => {
+              const d = new Date(date);
+              d.setHours(0, 0, 0, 0);
+              openCreateModal(d, undefined, true);
+            }}
+            onNewTask={enableCalendarTasks ? () => {
+              setEditTask(null);
+              setShowTaskModal(true);
+            } : undefined}
+            onGoToToday={goToToday}
+          />
+        );
+      })()}
+
       {detailEvent && detailAnchorRect && (
         <EventDetailPopover
           event={detailEvent}
-          calendar={calendars.find(c => detailEvent.calendarIds[c.id])}
+          calendar={displayCalendars.find(c => detailEvent.calendarIds[c.id])}
           anchorRect={detailAnchorRect}
           onEdit={handleEditFromDetail}
           onDelete={handleDeleteFromDetail}
@@ -1305,15 +1609,16 @@ export default function CalendarPage() {
         <EventModal
           key={editEvent?.id ?? 'new'}
           event={editEvent}
-          calendars={calendars}
+          calendars={displayCalendars}
           defaultDate={defaultModalDate}
           defaultEndDate={defaultModalEndDate}
+          defaultAllDay={defaultModalAllDay}
           defaultCalendarId={defaultCalendarIdForCreate}
           onSave={handleSaveEvent}
           onDelete={handleDeleteEvent}
           onDuplicate={handleDuplicateEvent}
           onRsvp={handleRsvp}
-          onClose={() => { setShowEventModal(false); setEditEvent(null); setDefaultCalendarIdForCreate(undefined); }}
+          onClose={() => { setShowEventModal(false); setEditEvent(null); setDefaultCalendarIdForCreate(undefined); setDefaultModalAllDay(false); }}
           currentUserEmails={currentUserEmails}
           isMobile={true}
         />
@@ -1321,16 +1626,25 @@ export default function CalendarPage() {
 
       {showImportModal && client && (
         <ICalImportModal
-          calendars={calendars}
+          calendars={displayCalendars}
           client={client}
-          onClose={() => setShowImportModal(false)}
+          initialUrl={pendingSubscription?.url}
+          onClose={() => {
+            setShowImportModal(false);
+            setPendingSubscription(null);
+          }}
         />
       )}
 
       {showSubscriptionModal && client && (
         <ICalSubscriptionModal
           client={client}
-          onClose={() => setShowSubscriptionModal(false)}
+          initialUrl={pendingSubscription?.url}
+          initialName={pendingSubscription?.name}
+          onClose={() => {
+            setShowSubscriptionModal(false);
+            setPendingSubscription(null);
+          }}
         />
       )}
 
@@ -1347,6 +1661,8 @@ export default function CalendarPage() {
       })()}
 
       <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+      {renderWebcalAccountPicker()}
+      {renderWebcalActionChoice()}
       <RecurrenceScopeDialog
         isOpen={!!pendingScopeAction}
         actionType={pendingScopeAction?.type || "edit"}
@@ -1380,6 +1696,7 @@ export default function CalendarPage() {
           />
         );
       })()}
+      </div>
     </div>
   );
 }

app/(main)/[locale]/contacts/page.tsx

@@ -2,7 +2,9 @@
 
 import { useState, useEffect, useCallback, useRef, useMemo } from "react";
 import { useTranslations } from "next-intl";
-import { ArrowLeft, Users } from "lucide-react";
+import { useSearchParams } from "next/navigation";
+import { useRouter } from "@/i18n/navigation";
+import { ArrowLeft, Users, AlertTriangle } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
@@ -15,17 +17,23 @@ import { ContactsSidebar, type ContactCategory } from "@/components/contacts/con
 import { ContactImportDialog } from "@/components/contacts/contact-import-dialog";
 import { RenameDialog } from "@/components/files/rename-dialog";
 import { exportContacts } from "@/components/contacts/contact-export";
-import { useContactStore, getContactDisplayName } from "@/stores/contact-store";
+import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
+import { useContactStore, getContactDisplayName, getContactPrimaryEmail } from "@/stores/contact-store";
+import { savePendingMailto } from "@/lib/protocol-handlers/session";
+import { formatRecipient, formatRecipientEntry, type Recipient } from "@/lib/email-composer-utils";
 import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
 import { useEmailStore } from "@/stores/email-store";
+import { usePolicyStore } from "@/stores/policy-store";
 import { toast } from "@/stores/toast-store";
 import { cn, generateUUID } from "@/lib/utils";
 import { NavigationRail } from "@/components/layout/navigation-rail";
 import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useIsEmbedded } from "@/hooks/use-is-embedded";
+import { useProMultiAccountContacts } from "@/hooks/use-pro-multi-account-contacts";
 import { ResizeHandle } from "@/components/layout/resize-handle";
-import { useIsMobile } from "@/hooks/use-media-query";
+import { useIsDesktop, useIsMobile } from "@/hooks/use-media-query";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
 import type { ContactCard, AddressBook, AddressBookRights } from "@/lib/jmap/types";
 import { ShareCollectionDialog } from "@/components/settings/share-collection-dialog";
@@ -42,6 +50,7 @@ type View =
 
 export default function ContactsPage() {
   const t = useTranslations("contacts");
+  const contactsEnabled = usePolicyStore((s) => s.isFeatureEnabled('contactsEnabled'));
   const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
@@ -75,6 +84,7 @@ export default function ContactsPage() {
     bulkDeleteContacts,
     bulkAddToGroup,
     moveContactToAddressBook,
+    createAddressBook,
     renameAddressBook,
     removeAddressBook,
     shareAddressBook,
@@ -86,13 +96,29 @@ export default function ContactsPage() {
   const [activeCategory, setActiveCategory] = useState<ContactCategory>("all");
   const [showImportDialog, setShowImportDialog] = useState(false);
   const [renamingAddressBook, setRenamingAddressBook] = useState<AddressBook | null>(null);
+  const [creatingAddressBook, setCreatingAddressBook] = useState(false);
   const [sharingAddressBookId, setSharingAddressBookId] = useState<string | null>(null);
   const [defaultBookIdForCreate, setDefaultBookIdForCreate] = useState<string | undefined>(undefined);
+  const [createPrefill, setCreatePrefill] = useState<{ email?: string; name?: string } | undefined>(undefined);
+  const [returnToEmail, setReturnToEmail] = useState(false);
   const [renamingKeyword, setRenamingKeyword] = useState<string | null>(null);
   const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null);
   const hasFetched = useRef(false);
   const { dialogProps: confirmDialogProps, confirm: confirmDialog } = useConfirmDialog();
   const isMobile = useIsMobile();
+  const isDesktop = useIsDesktop();
+  const isEmbedded = useIsEmbedded();
+  const router = useRouter();
+  const searchParams = useSearchParams();
+  // One-shot intent flag: only consume the URL params on the first render that
+  // has them. After applying, we strip the query so a later refresh or
+  // re-mount doesn't re-trigger the navigation.
+  const intentAppliedRef = useRef(false);
+  // Narrow pane (Pro split or small window): the categories sidebar collapses
+  // into a burger-toggled overlay.
+  const isNarrow = !isDesktop;
+  const [narrowSidebarOpen, setNarrowSidebarOpen] = useState(false);
+  useEffect(() => { if (!isNarrow) setNarrowSidebarOpen(false); }, [isNarrow]);
 
   // Panel resize state - sidebar (categories)
   const [sidebarWidth, setSidebarWidth] = useState(() => {
@@ -129,12 +155,42 @@ export default function ContactsPage() {
     }
   }, [initialCheckDone, isAuthenticated, authLoading]);
 
+  // Pro shell only: aggregate contacts and address books from every
+  // connected account so the sidebar lists them all. The hook is a no-op
+  // outside the embedded shell.
+  const { enabled: multiAccountEnabled, accountClients } = useProMultiAccountContacts();
+
   useEffect(() => {
+    if (isEmbedded) return;
     if (client && supportsSync && !hasFetched.current) {
       hasFetched.current = true;
       fetchContacts(client);
     }
-  }, [client, supportsSync, fetchContacts]);
+  }, [client, supportsSync, fetchContacts, isEmbedded]);
+
+  // Consume one-shot URL params (set by the mobile recipient popover when no
+  // sidebar is available) and strip them so a refresh doesn't replay the
+  // intent. `from=email` flips the mobile back button to `router.back()`.
+  useEffect(() => {
+    if (intentAppliedRef.current) return;
+    const contactId = searchParams.get('contactId');
+    const addEmail = searchParams.get('addEmail');
+    const addName = searchParams.get('addName');
+    const from = searchParams.get('from');
+    const viewParam = searchParams.get('view');
+    if (!contactId && !addEmail && !from) return;
+    intentAppliedRef.current = true;
+    if (from === 'email') setReturnToEmail(true);
+    if (contactId) {
+      setSelectedContact(contactId);
+      setView(viewParam === 'edit' ? 'edit' : 'detail');
+    } else if (addEmail) {
+      setCreatePrefill({ email: addEmail, name: addName ?? undefined });
+      setSelectedContact(null);
+      setView('create');
+    }
+    router.replace('/contacts');
+  }, [searchParams, router, setSelectedContact]);
 
   // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
   // and refresh contacts via JMAP instead of reloading the page.
@@ -142,6 +198,17 @@ export default function ContactsPage() {
     enabled: isAuthenticated && !!client && supportsSync,
     onRefresh: async () => {
       if (!client) return;
+      if (multiAccountEnabled && accountClients.length > 0) {
+        const activeId = useAuthStore.getState().activeAccountId;
+        if (activeId) {
+          const { fetchAllAccountsContacts, fetchAllAccountsAddressBooks } = useContactStore.getState();
+          await Promise.all([
+            fetchAllAccountsAddressBooks(accountClients, activeId),
+            fetchAllAccountsContacts(accountClients, activeId),
+          ]);
+          return;
+        }
+      }
       await fetchContacts(client);
     },
   });
@@ -193,6 +260,7 @@ export default function ContactsPage() {
     } else {
       setSelectedGroupId(null);
     }
+    setNarrowSidebarOpen(false);
   }, [clearSelection]);
 
   const handleDropContacts = useCallback(async (contactIds: string[], addressBook: AddressBook) => {
@@ -234,6 +302,34 @@ export default function ContactsPage() {
     }
   }, [client, supportsSync, contacts, updateContact, updateLocalContact, t]);
 
+  // Refresh address books (and contacts) after a structural change, staying
+  // multi-account aware so a freshly created book lands in the sidebar.
+  const refreshAddressBooks = useCallback(async () => {
+    if (!client) return;
+    if (multiAccountEnabled && accountClients.length > 0) {
+      const activeId = useAuthStore.getState().activeAccountId;
+      if (activeId) {
+        const { fetchAllAccountsAddressBooks } = useContactStore.getState();
+        await fetchAllAccountsAddressBooks(accountClients, activeId);
+        return;
+      }
+    }
+    await useContactStore.getState().fetchAddressBooks(client);
+  }, [client, multiAccountEnabled, accountClients]);
+
+  const handleCreateAddressBook = useCallback(async (name: string) => {
+    if (!client) return;
+    try {
+      await createAddressBook(client, name);
+      await refreshAddressBooks();
+      toast.success(t("address_books.created"));
+      setCreatingAddressBook(false);
+    } catch (error) {
+      console.error('Failed to create address book:', error);
+      toast.error(t("address_books.create_failed"));
+    }
+  }, [client, createAddressBook, refreshAddressBooks, t]);
+
   const handleImportContacts = useCallback(async (importedContacts: ContactCard[]) => {
     return importContacts(
       supportsSync && client ? client : null,
@@ -304,8 +400,8 @@ export default function ContactsPage() {
   }, [clearSelection, toggleContactSelection, groups.length]);
 
   const handleDuplicateContact = useCallback(async (source: ContactCard) => {
-    const { id: _id, created: _created, updated: _updated, ...rest } = source;
-    void _id; void _created; void _updated;
+    const { id: _id, uid: _uid, created: _created, updated: _updated, ...rest } = source;
+    void _id; void _uid; void _created; void _updated;
     const data: Partial<ContactCard> = JSON.parse(JSON.stringify(rest));
     if (supportsSync && client) {
       await createContact(client, data);
@@ -335,8 +431,14 @@ export default function ContactsPage() {
       toast.success(t("toast.created"));
     }
     setDefaultBookIdForCreate(undefined);
+    setCreatePrefill(undefined);
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
     setView("list");
-  }, [supportsSync, client, createContact, addLocalContact, t]);
+  }, [supportsSync, client, createContact, addLocalContact, t, returnToEmail, router]);
 
   const handleSaveEdit = useCallback(async (data: Partial<ContactCard>) => {
     if (!selectedContact) return;
@@ -353,6 +455,14 @@ export default function ContactsPage() {
 
   const handleCancel = () => {
     setDefaultBookIdForCreate(undefined);
+    // Came from email → cancel returns to the email instead of the contact list.
+    if (returnToEmail && view === "create") {
+      setCreatePrefill(undefined);
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
+    if (view === "create") setCreatePrefill(undefined);
     if (view === "group-create" || view === "group-edit") {
       setView(selectedGroup ? "group-detail" : "list");
     } else if (view === "bulk-add-to-group") {
@@ -383,6 +493,59 @@ export default function ContactsPage() {
     setView("group-edit");
   }, []);
 
+  // Open the in-app composer in the current session rather than routing through
+  // a mailto: URL. `window.location='mailto:'` hands off to the OS handler
+  // (which may open a different mail app), and the mailto protocol round-trip
+  // reloads the app - dropping the in-memory per-account JMAP clients of a
+  // multi-account session, which reads as a logout. Stashing the recipients and
+  // doing a client-side router.push keeps the session and the active account
+  // intact; the main route consumes the pending compose and opens the composer
+  // (see consumePendingMailto in page.tsx).
+  const openComposeInApp = useCallback((recipients: string[], field: "to" | "cc" | "bcc") => {
+    savePendingMailto({
+      to: field === "to" ? recipients : [],
+      cc: field === "cc" ? recipients : [],
+      bcc: field === "bcc" ? recipients : [],
+      subject: "",
+      body: "",
+    });
+    router.push("/");
+  }, [router]);
+
+  const handleComposeGroupFromSidebar = useCallback((groupId: string, field: "to" | "cc" | "bcc") => {
+    // Hand the composer a single group chip (RFC 5322 group syntax survives
+    // the string hand-off) instead of one entry per member - the chip expands
+    // into the members when the message is sent. Dedupe by email,
+    // case-insensitively; members without an email are skipped.
+    const seen = new Set<string>();
+    const members: Array<{ name?: string; email: string }> = [];
+    for (const member of getGroupMembers(groupId)) {
+      const email = getContactPrimaryEmail(member).trim();
+      const key = email.toLowerCase();
+      if (!email || seen.has(key)) continue;
+      seen.add(key);
+      const name = getContactDisplayName(member);
+      members.push({ name: name && name !== email ? name : undefined, email });
+    }
+    if (members.length === 0) {
+      toast.error(t("groups.no_member_emails"));
+      return;
+    }
+    const group = useContactStore.getState().contacts.find((c) => c.id === groupId);
+    const chip: Recipient = {
+      name: (group && getContactDisplayName(group)) || "Group",
+      email: "",
+      group: { members },
+    };
+    openComposeInApp([formatRecipientEntry(chip)], field);
+  }, [getGroupMembers, t, openComposeInApp]);
+
+  const handleComposeContact = useCallback((contact: ContactCard) => {
+    const email = getContactPrimaryEmail(contact).trim();
+    if (!email) return;
+    openComposeInApp([formatRecipient(getContactDisplayName(contact), email)], "to");
+  }, [openComposeInApp]);
+
   const handleDeleteGroupFromSidebar = useCallback(async (groupId: string) => {
     const confirmed = await confirmDialog({
       title: t("groups.delete_confirm_title"),
@@ -524,7 +687,7 @@ export default function ContactsPage() {
   const renderRightPanel = () => {
     switch (view) {
       case "create":
-        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} onSave={handleSaveNew} onCancel={handleCancel} />;
+        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} prefill={createPrefill} onSave={handleSaveNew} onCancel={handleCancel} />;
 
       case "edit":
         if (!selectedContact) return null;
@@ -547,6 +710,7 @@ export default function ContactsPage() {
             onEdit={handleEditGroup}
             onDelete={handleDeleteGroup}
             onRemoveMember={handleRemoveGroupMember}
+            onComposeGroup={(field) => handleComposeGroupFromSidebar(selectedGroup.id, field)}
             isMobile={isMobile}
             onSelectMember={(id) => {
               setSelectedContact(id);
@@ -595,7 +759,7 @@ export default function ContactsPage() {
                   <button
                     key={group.id}
                     onClick={() => handleBulkAddToGroupConfirm(group.id)}
-                    className="w-full flex items-center gap-3 px-6 py-3 text-left hover:bg-muted transition-colors"
+                    className="w-full flex items-center gap-3 px-6 py-3 text-start hover:bg-muted transition-colors"
                   >
                     <div className="w-9 h-9 rounded-full bg-primary/10 flex items-center justify-center flex-shrink-0">
                       <Users className="w-4 h-4 text-primary" />
@@ -624,6 +788,11 @@ export default function ContactsPage() {
             contact={selectedContact}
             onEdit={handleEdit}
             onDelete={handleDelete}
+            onCompose={
+              selectedContact
+                ? () => handleComposeContact(selectedContact)
+                : undefined
+            }
             onAddToGroup={
               selectedContact
                 ? () => handleAddContactToGroup(selectedContact.id)
@@ -640,18 +809,38 @@ export default function ContactsPage() {
     }
   };
 
+  if (!contactsEnabled) {
+    return (
+      <div className="flex h-dvh items-center justify-center bg-background p-6">
+        <div className="max-w-lg text-center space-y-3">
+          <AlertTriangle className="w-10 h-10 text-yellow-500 mx-auto" />
+          <p className="text-sm font-medium">Contacts feature is disabled by your administrator</p>
+          <p className="text-xs text-muted-foreground">Please contact your administrator if you need access.</p>
+        </div>
+      </div>
+    );
+  }
+
   const showListPanel = !isMobile || view === "list";
   const showRightPanel = !isMobile || view !== "list";
 
   const mobileBackToList = () => {
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      setCreatePrefill(undefined);
+      router.back();
+      return;
+    }
     setView("list");
     clearSelection();
   };
 
   return (
-    <div className={cn("flex h-dvh bg-background overflow-hidden", isMobile && "flex-col")}>
-      {/* Navigation Rail - desktop only */}
-      {!isMobile && (
+    <div className={cn("flex flex-col bg-background overflow-hidden pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className={cn("flex flex-1 min-h-0 overflow-hidden", isMobile && "flex-col")}>
+      {/* Navigation Rail - desktop only (hidden when embedded in Pro shell) */}
+      {!isMobile && !isEmbedded && (
         <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
           <NavigationRail
             collapsed
@@ -670,18 +859,33 @@ export default function ContactsPage() {
         {inlineApp && (
           <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} />
         )}
-        <div className={cn("flex flex-1 min-h-0", inlineApp && "hidden")}>
+        <div className={cn("relative flex flex-1 min-h-0", inlineApp && "hidden")}>
+          {/* Narrow-pane backdrop for the overlay categories sidebar */}
+          {isNarrow && narrowSidebarOpen && (
+            <div
+              className={cn(
+                "inset-0 bg-black/50 z-40",
+                isEmbedded ? "absolute" : "fixed"
+              )}
+              onClick={() => setNarrowSidebarOpen(false)}
+            />
+          )}
           {showListPanel && (
             <>
-              {/* Panel 1: Categories sidebar */}
-              {!isMobile && (
+              {/* Panel 1: Categories sidebar (in-flow on desktop, overlay on narrow) */}
+              {(!isMobile || isNarrow) && (
                 <>
                   <div
                     className={cn(
-                      "border-r border-border flex flex-col flex-shrink-0",
-                      !isSidebarResizing && "transition-[width] duration-300"
+                      "border-e border-border flex flex-col flex-shrink-0 bg-background",
+                      !isSidebarResizing && "transition-[width] duration-300",
+                      isNarrow && cn(
+                        "absolute inset-y-0 left-0 z-50 w-72 pt-[env(safe-area-inset-top)]",
+                        "transform transition-transform duration-300 ease-in-out",
+                        !narrowSidebarOpen && "-translate-x-full"
+                      )
                     )}
-                    style={{ width: `${sidebarWidth}px` }}
+                    style={isNarrow ? undefined : { width: `${sidebarWidth}px` }}
                   >
                     <ContactsSidebar
                       groups={groups}
@@ -691,9 +895,11 @@ export default function ContactsPage() {
                       onSelectCategory={handleSelectCategory}
                       onCreateGroup={handleCreateGroup}
                       onCreateContact={handleCreateNew}
+                      onCreateAddressBook={client ? () => setCreatingAddressBook(true) : undefined}
                       onImport={() => setShowImportDialog(true)}
                       onEditGroup={handleEditGroupFromSidebar}
                       onDeleteGroup={handleDeleteGroupFromSidebar}
+                      onComposeGroup={handleComposeGroupFromSidebar}
                       onDropContacts={handleDropContacts}
                       onDropContactsToCategory={handleDropContactsToCategory}
                       onRenameAddressBook={client ? (book) => setRenamingAddressBook(book) : undefined}
@@ -718,17 +924,20 @@ export default function ContactsPage() {
                         }
                       } : undefined}
                       onRenameKeyword={(kw) => setRenamingKeyword(kw)}
+                      multiAccountMode={multiAccountEnabled && accountClients.length > 1}
                     />
                   </div>
-                  <ResizeHandle
-                    onResizeStart={() => { sidebarDragStartWidth.current = sidebarWidth; setIsSidebarResizing(true); }}
-                    onResize={(delta) => setSidebarWidth(Math.max(180, Math.min(400, sidebarDragStartWidth.current + delta)))}
-                    onResizeEnd={() => {
-                      setIsSidebarResizing(false);
-                      localStorage.setItem("contacts-sidebar-width", String(sidebarWidth));
-                    }}
-                    onDoubleClick={() => { setSidebarWidth(256); localStorage.setItem("contacts-sidebar-width", "256"); }}
-                  />
+                  {!isNarrow && (
+                    <ResizeHandle
+                      onResizeStart={() => { sidebarDragStartWidth.current = sidebarWidth; setIsSidebarResizing(true); }}
+                      onResize={(delta) => setSidebarWidth(Math.max(180, Math.min(400, sidebarDragStartWidth.current + delta)))}
+                      onResizeEnd={() => {
+                        setIsSidebarResizing(false);
+                        localStorage.setItem("contacts-sidebar-width", String(sidebarWidth));
+                      }}
+                      onDoubleClick={() => { setSidebarWidth(256); localStorage.setItem("contacts-sidebar-width", "256"); }}
+                    />
+                  )}
                 </>
               )}
 
@@ -736,7 +945,7 @@ export default function ContactsPage() {
               <div
                 data-tour="contacts-list"
                 className={cn(
-                  "border-r border-border bg-background flex flex-col flex-shrink-0",
+                  "border-e border-border bg-background flex flex-col flex-shrink-0",
                   isMobile ? "w-full" : "",
                   !isListResizing && !isMobile && "transition-[width] duration-300"
                 )}
@@ -761,6 +970,7 @@ export default function ContactsPage() {
                   onEditContact={handleEditContact}
                   onDeleteContact={handleDeleteContact}
                   onAddContactToGroup={handleAddContactToGroup}
+                  onMenuClick={isNarrow ? () => setNarrowSidebarOpen(true) : undefined}
                 />
               </div>
 
@@ -789,8 +999,8 @@ export default function ContactsPage() {
                     onClick={mobileBackToList}
                     className="touch-manipulation"
                   >
-                    <ArrowLeft className="w-4 h-4 mr-2" />
-                    {t("back_to_contacts")}
+                    <ArrowLeft className="w-4 h-4 me-2" />
+                    {returnToEmail ? t("back_to_email") : t("back_to_contacts")}
                   </Button>
                 </div>
               )}
@@ -801,7 +1011,7 @@ export default function ContactsPage() {
           )}
         </div>
 
-        {isMobile && (
+        {isMobile && !isEmbedded && (
           <NavigationRail
             orientation="horizontal"
             onManageApps={handleManageApps}
@@ -835,6 +1045,15 @@ export default function ContactsPage() {
           }}
         />
       )}
+      {creatingAddressBook && (
+        <RenameDialog
+          currentName=""
+          title={t("address_books.create")}
+          label={t("address_books.name_label")}
+          onCancel={() => setCreatingAddressBook(false)}
+          onConfirm={handleCreateAddressBook}
+        />
+      )}
       {renamingAddressBook && (
         <RenameDialog
           currentName={renamingAddressBook.name}
@@ -882,6 +1101,7 @@ export default function ContactsPage() {
           />
         );
       })()}
+      </div>
     </div>
   );
 }

app/(main)/[locale]/error.tsx

@@ -38,11 +38,11 @@ export default function LocaleError({
         </p>
         <div className="flex gap-3 justify-center">
           <Button variant="outline" onClick={() => router.push('/')}>
-            <Home className="w-4 h-4 mr-2" />
+            <Home className="w-4 h-4 me-2" />
             {t("go_home")}
           </Button>
           <Button onClick={reset}>
-            <RefreshCw className="w-4 h-4 mr-2" />
+            <RefreshCw className="w-4 h-4 me-2" />
             {t("try_again")}
           </Button>
         </div>

app/(main)/[locale]/files/page.tsx

@@ -8,6 +8,7 @@ import { Button } from "@/components/ui/button";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
 import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
+import { useAccountStore } from "@/stores/account-store";
 import { useEmailStore } from "@/stores/email-store";
 import { useFileStore } from "@/stores/file-store";
 import { toast } from "@/stores/toast-store";
@@ -16,21 +17,27 @@ import { NavigationRail } from "@/components/layout/navigation-rail";
 import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
 import { InlineAppView } from "@/components/layout/inline-app-view";
 import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useIsEmbedded } from "@/hooks/use-is-embedded";
 import { useIsMobile } from "@/hooks/use-media-query";
 import { useRefreshGesture } from "@/hooks/use-refresh-gesture";
 import { usePolicyStore } from "@/stores/policy-store";
 import { FileBrowser } from "@/components/files/file-browser";
+import type { FileNodeRights } from "@/lib/jmap/types";
 import { ImagePreviewModal } from "@/components/files/image-preview-modal";
 import { FilePreviewModal } from "@/components/files/file-preview-modal";
 import { loadFilesSettings } from "@/components/files/files-settings-dialog";
 import type { FolderLayout } from "@/components/files/files-settings-dialog";
-import { AlertTriangle } from "lucide-react";
+import { AppTopBannerSlot } from "@/components/plugins/app-top-banner-slot";
+import { AlertTriangle, Loader2 } from "lucide-react";
 
 export default function FilesPage() {
   const router = useRouter();
   const t = useTranslations("files");
   const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
   const { isAuthenticated, logout, checkAuth, isLoading: authLoading, client } = useAuthStore();
+  const activeAccountId = useAuthStore((s) => s.activeAccountId);
+  const getClientForAccount = useAuthStore((s) => s.getClientForAccount);
+  const accounts = useAccountStore((s) => s.accounts);
   const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
   const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
   const { quota, isPushConnected } = useEmailStore();
@@ -42,9 +49,11 @@ export default function FilesPage() {
     supportsFiles,
     selectedResources,
     uploadProgress,
+    migrationProgress,
     clipboard,
     initClient,
     checkSupport,
+    migrateLegacyFlatNodes,
     navigate,
     navigateByPath,
     refresh,
@@ -80,9 +89,11 @@ export default function FilesPage() {
     cancelUpload,
     undoLastAction,
     lastAction,
+    shareResource,
   } = useFileStore();
 
   const isMobile = useIsMobile();
+  const isEmbedded = useIsEmbedded();
   const [folderLayout, setFolderLayout] = useState<FolderLayout>(() => loadFilesSettings().folderLayout);
   const hasFetched = useRef(false);
 
@@ -127,13 +138,18 @@ export default function FilesPage() {
     }
   }, [initialCheckDone, isAuthenticated, authLoading]);
 
-  // Initialize JMAP files client
+  // Initialize JMAP files client. In the Pro shell, all connected accounts
+  // are surfaced as top-level folders at the root, so we *don't* auto-attach
+  // to the active account - the user picks one explicitly.
   useEffect(() => {
-    if (isAuthenticated && client && !hasFetched.current) {
-      hasFetched.current = true;
-      initClient(client);
+    if (!isAuthenticated || !client || hasFetched.current) return;
+    hasFetched.current = true;
+    if (isEmbedded) {
+      useFileStore.getState().clearClient();
+    } else {
+      initClient(client, activeAccountId);
     }
-  }, [isAuthenticated, client, initClient]);
+  }, [isAuthenticated, client, initClient, activeAccountId, isEmbedded]);
 
   // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
   // and refresh files via JMAP instead of reloading the page.
@@ -148,15 +164,29 @@ export default function FilesPage() {
   const storeClient = useFileStore(s => s.client);
   useEffect(() => {
     if (storeClient && supportsFiles === null) {
-      checkSupport().then((supported) => {
+      checkSupport().then(async (supported) => {
         if (supported) {
+          // Upgrade any files created by older builds (flat path-encoded names)
+          // into the real FileNode hierarchy before the first listing.
+          await migrateLegacyFlatNodes();
           navigate(null);
         }
       });
     }
-  }, [storeClient, supportsFiles, checkSupport, navigate]);
+  }, [storeClient, supportsFiles, checkSupport, migrateLegacyFlatNodes, navigate]);
 
   const handleNavigate = useCallback((path: string, resourceId?: string | null) => {
+    // Pro shell only: the Account breadcrumb segment signals "go to this
+    // account's filesystem root" via a sentinel, distinguishing it from a
+    // Home click (which detaches the account and returns to the picker).
+    if (resourceId === '__account_root__') {
+      void navigate(null);
+      return;
+    }
+    if (isEmbedded && path === '/' && resourceId === undefined) {
+      useFileStore.getState().clearClient();
+      return;
+    }
     if (resourceId !== undefined) {
       // Direct ID-based navigation (directory click, breadcrumb dropdown folder)
       navigate(resourceId, path.split('/').pop() || '');
@@ -164,7 +194,7 @@ export default function FilesPage() {
       // Path-based navigation (breadcrumbs, favorites, recent files)
       navigateByPath(path);
     }
-  }, [navigate, navigateByPath]);
+  }, [navigate, navigateByPath, isEmbedded]);
 
   const handleCreateFolder = useCallback(async (name: string) => {
     try {
@@ -371,11 +401,53 @@ export default function FilesPage() {
     setShowDetails(v => !v);
   }, []);
 
+  const currentFilesAccountId = useFileStore((s) => s.currentAccountId);
+
+  // Sharing: the browsing client (store-attached) drives the principal picker
+  // and share mutations. supportsPrincipals() gates the whole Share affordance.
+  const sharingEnabled = !!storeClient?.supportsPrincipals();
+  const filesAccountId = storeClient?.getFilesAccountId() ?? null;
+  const handleShare = useCallback(async (id: string, principalId: string, rights: FileNodeRights | null) => {
+    await shareResource(id, principalId, rights);
+  }, [shareResource]);
+
+  // Pro shell only: all connected accounts are equal top-level entries at
+  // the root. The root path "/" itself is a cross-account picker - no
+  // account's files are shown until the user enters one.
+  const accountFolders = isEmbedded
+    ? accounts
+        .filter((a) => a.isConnected)
+        .map((a) => ({
+          accountId: a.id,
+          label: a.label || a.email,
+          email: a.email,
+          avatarColor: a.avatarColor,
+        }))
+    : [];
+  const isAccountPicker = isEmbedded && currentFilesAccountId === null;
+  const currentAccountLabel = isEmbedded && currentFilesAccountId
+    ? (accounts.find((a) => a.id === currentFilesAccountId)?.label
+        || accounts.find((a) => a.id === currentFilesAccountId)?.email
+        || null)
+    : null;
+
+  const handleSelectAccount = useCallback((accountId: string) => {
+    const nextClient = getClientForAccount(accountId);
+    if (!nextClient) return;
+    const store = useFileStore.getState();
+    store.initClient(nextClient, accountId);
+    // Reset supportsFiles so the existing checkSupport effect re-runs for
+    // the freshly-attached client and triggers the initial navigate(null).
+    useFileStore.setState({ supportsFiles: null });
+  }, [getClientForAccount]);
+
   if (!isAuthenticated) return null;
 
   return (
-    <div className="flex h-dvh bg-background overflow-hidden">
-      {!isMobile && (
+    <div className={cn("flex flex-col bg-background overflow-hidden pt-[env(safe-area-inset-top)]", isEmbedded ? "h-full" : "h-dvh")}>
+      <AppTopBannerSlot />
+      <div className="flex flex-1 min-h-0 overflow-hidden">
+      {!isMobile && !isEmbedded && (
         <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
           <NavigationRail
             collapsed
@@ -396,7 +468,7 @@ export default function FilesPage() {
         )}
         <div className={cn("flex flex-1 min-h-0", inlineApp && "hidden")}>
           <div className="flex-1 min-w-0 flex flex-col">
-            {folderLayout !== "sidebar" && (
+            {folderLayout !== "sidebar" && !isEmbedded && (
               <div className={cn("p-4 border-b border-border", isMobile && "px-3 py-3")}>
                 <div className="flex items-center justify-between">
                   <Button
@@ -405,7 +477,7 @@ export default function FilesPage() {
                     onClick={() => router.push("/")}
                     className="justify-start"
                   >
-                    <ArrowLeft className="w-4 h-4 mr-2" />
+                    <ArrowLeft className="w-4 h-4 me-2" />
                     {t("title")}
                   </Button>
                 </div>
@@ -474,6 +546,14 @@ export default function FilesPage() {
                   showDetails={showDetails}
                   onToggleDetails={handleToggleDetails}
                   detailResource={detailResource}
+                  accountFolders={accountFolders}
+                  onSelectAccount={handleSelectAccount}
+                  accountPickerMode={isAccountPicker}
+                  accountLabel={currentAccountLabel}
+                  client={storeClient}
+                  ownAccountId={filesAccountId}
+                  sharingEnabled={sharingEnabled}
+                  onShare={handleShare}
                 />
                 </div>
               )}
@@ -481,7 +561,7 @@ export default function FilesPage() {
           </div>
         </div>
 
-        {isMobile && (
+        {isMobile && !isEmbedded && (
           <NavigationRail
             orientation="horizontal"
             onManageApps={handleManageApps}
@@ -512,8 +592,35 @@ export default function FilesPage() {
         />
       )}
 
+      {/* Legacy file migration progress (issue #379) */}
+      {migrationProgress && (
+        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 backdrop-blur-sm">
+          <div className="w-[22rem] max-w-[90vw] rounded-lg border border-border bg-background p-6 shadow-xl">
+            <div className="flex items-center gap-3">
+              <Loader2 className="w-5 h-5 text-primary animate-spin shrink-0" />
+              <div>
+                <p className="text-sm font-medium">{t("migration_title")}</p>
+                <p className="text-xs text-muted-foreground">{t("migration_description")}</p>
+              </div>
+            </div>
+            <div className="mt-4 h-1.5 bg-primary/20 rounded-full overflow-hidden">
+              <div
+                className="h-full bg-primary rounded-full transition-all duration-300"
+                style={{ width: migrationProgress.total > 0
+                  ? `${(migrationProgress.current / migrationProgress.total) * 100}%`
+                  : '0%' }}
+              />
+            </div>
+            <p className="mt-2 text-xs text-muted-foreground tabular-nums text-end">
+              {migrationProgress.current} / {migrationProgress.total}
+            </p>
+          </div>
+        </div>
+      )}
+
       <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
       <ConfirmDialog {...confirmDialogProps} />
+      </div>
     </div>
   );
 }

app/(main)/[locale]/layout.tsx

@@ -5,6 +5,12 @@ import { CalendarAlertProvider } from "@/components/providers/calendar-alert-pro
 import { EmbeddedBridgeProvider } from "@/components/providers/embedded-bridge-provider";
 import { RateLimitToastProvider } from "@/components/providers/rate-limit-toast-provider";
 import { TourProvider } from "@/components/tour/tour-provider";
+import { ProtocolLaunchHandlerProvider } from "@/components/protocol/protocol-launch-handler-provider";
+import { ProInterfaceRedirect } from "@/components/pro/pro-interface-redirect";
+import { ImpersonationReconciler } from "@/components/impersonation/impersonation-reconciler";
+import { PluginDialogHost } from "@/components/plugins/plugin-dialog-host";
+import { PluginConsentDialog } from "@/components/plugins/plugin-consent-dialog";
+import { PWAInstallPrompt } from "@/components/pwa-install-prompt";
 import { locales } from "@/i18n/routing";
 
 export default async function LocaleLayout({
@@ -32,7 +38,14 @@ export default async function LocaleLayout({
           <RateLimitToastProvider>
             <EmbeddedBridgeProvider>
               <TourProvider>
-                {children}
+                <ProtocolLaunchHandlerProvider>
+                  <ProInterfaceRedirect />
+                  <ImpersonationReconciler />
+                  {children}
+                  <PluginDialogHost />
+                  <PluginConsentDialog />
+                  <PWAInstallPrompt />
+                </ProtocolLaunchHandlerProvider>
               </TourProvider>
             </EmbeddedBridgeProvider>
           </RateLimitToastProvider>

app/(main)/[locale]/login/page.tsx

@@ -7,15 +7,25 @@ import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { useAuthStore } from "@/stores/auth-store";
+import { useAccountStore } from "@/stores/account-store";
 import { useThemeStore } from "@/stores/theme-store";
+import { resolveThemeLogo } from "@/lib/theme-logo";
 import { useShallow } from "zustand/react/shallow";
 import { useConfig } from "@/hooks/use-config";
-import { apiFetch, getPathPrefix } from "@/lib/browser-navigation";
+import { apiFetch, getPathPrefix, toRouterPath, withBasePath } from "@/lib/browser-navigation";
 import { cn } from "@/lib/utils";
 import { AlertCircle, Loader2, X, Info, Eye, EyeOff, LogIn, Sun, Moon, Monitor, Check, Shield, Play, Copy } from "lucide-react";
-import { discoverOAuth, type OAuthMetadata } from "@/lib/oauth/discovery";
+import { type OAuthMetadata } from "@/lib/oauth/discovery";
 import { generateCodeVerifier, generateCodeChallenge, generateState } from "@/lib/oauth/pkce";
-import { OAUTH_SCOPES } from "@/lib/oauth/tokens";
+import { useUpdateStore, selectBanner } from "@/stores/update-store";
+import type { PublicJmapServerEntry } from "@/lib/admin/jmap-servers";
+
+function findServerByDomain(servers: PublicJmapServerEntry[], email: string | undefined): PublicJmapServerEntry | undefined {
+  if (!email || !email.includes("@")) return undefined;
+  const domain = email.split("@")[1]?.trim().toLowerCase();
+  if (!domain) return undefined;
+  return servers.find((s) => (s.domains ?? []).some((d) => d.toLowerCase() === domain));
+}
 
 const APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || "0.0.0";
 const GIT_COMMIT = process.env.NEXT_PUBLIC_GIT_COMMIT || "unknown";
@@ -28,7 +38,12 @@ const THEME_OPTIONS = [
 
 function VersionBadge() {
   const [copied, setCopied] = useState(false);
-  const versionInfo = `Version: ${APP_VERSION}\nBuild: ${GIT_COMMIT}`;
+  const banner = useUpdateStore(useShallow(selectBanner));
+  const startPolling = useUpdateStore((s) => s.startPolling);
+
+  useEffect(() => { startPolling(); }, [startPolling]);
+
+  const versionInfo = `Version: ${APP_VERSION}\nBuild: ${GIT_COMMIT}${banner?.latest ? `\nLatest: ${banner.latest}` : ""}`;
 
   const handleCopy = () => {
     navigator.clipboard.writeText(versionInfo).then(() => {
@@ -37,16 +52,49 @@ function VersionBadge() {
     });
   };
 
+  const isRed = banner?.variant === "red";
+  const triggerText = !banner
+    ? `v${APP_VERSION}`
+    : banner.severity === "security"
+      ? "Security update available"
+      : banner.severity === "deprecated"
+        ? "Version no longer supported"
+        : "New version available";
+
+  const triggerColor = !banner
+    ? "text-muted-foreground/40"
+    : isRed
+      ? "text-red-600/80 dark:text-red-400/80 hover:text-red-600 dark:hover:text-red-400"
+      : "text-amber-600/80 dark:text-amber-400/80 hover:text-amber-600 dark:hover:text-amber-400";
+
+  const triggerClass = cn(
+    "peer text-center text-xs transition-colors",
+    triggerColor,
+    banner?.url ? "cursor-pointer underline-offset-2 hover:underline" : "cursor-default",
+  );
+
+  const trigger = banner?.url ? (
+    <a href={banner.url} target="_blank" rel="noopener noreferrer" className={triggerClass}>
+      {triggerText}
+    </a>
+  ) : (
+    <p className={triggerClass}>{triggerText}</p>
+  );
+
   return (
     <div className="relative inline-flex justify-center">
-      <p className="peer text-center text-xs text-muted-foreground/40 cursor-default">
-        v{APP_VERSION}
-      </p>
+      {trigger}
       <div className="absolute top-full left-1/2 -translate-x-1/2 mt-1.5 px-3 py-2 rounded-md bg-popover text-popover-foreground text-xs shadow-md border border-border opacity-0 peer-hover:opacity-100 hover:opacity-100 transition-opacity whitespace-nowrap z-10">
         <div className="flex items-center gap-2">
           <div className="space-y-0.5">
             <p>Version: <span className="font-medium">{APP_VERSION}</span></p>
             <p>Build: <span className="font-medium">{GIT_COMMIT}</span></p>
+            {banner?.latest && (
+              <p>Latest: <span className="font-medium">{banner.latest}</span></p>
+            )}
+            {banner?.advisory && (
+              <p className="text-red-500 dark:text-red-400">{banner.advisory}</p>
+            )}
           </div>
           <button
             onClick={handleCopy}
@@ -61,22 +109,62 @@ function VersionBadge() {
   );
 }
 
+// Only redirect targets matching this scheme are honored by the mobile
+// handoff path. Without the check the login page becomes an open redirector
+// that funnels password and token material to any caller-supplied URL.
+const MOBILE_REDIRECT_SCHEME = "bulwarkmobile://";
+
 export default function LoginPage() {
   const router = useRouter();
   const t = useTranslations("login");
   const params = useParams();
   const searchParams = useSearchParams();
   const isAddAccountMode = searchParams.get("mode") === "add-account";
+
+  // When the mobile app launches the webmail in a browser tab it tacks on
+  // these params. We grab them once at mount and stash them in a ref so any
+  // login path that completes (password or OAuth) can hand control back to
+  // the app instead of routing into /mail.
+  const rawMobileRedirectUri = searchParams.get("mobile_redirect_uri") ?? "";
+  const rawMobileState = searchParams.get("mobile_state") ?? "";
+  const mobileRedirectUri = rawMobileRedirectUri.startsWith(MOBILE_REDIRECT_SCHEME)
+    ? rawMobileRedirectUri
+    : "";
+  const mobileState = mobileRedirectUri ? rawMobileState : "";
+  const isMobileHandoff = Boolean(mobileRedirectUri);
   const { login, loginDemo, isLoading, error, clearError, isAuthenticated } = useAuthStore();
   const { theme, setTheme, initializeTheme } = useThemeStore(useShallow((s) => ({ theme: s.theme, setTheme: s.setTheme, initializeTheme: s.initializeTheme })));
-  const { appName, jmapServerUrl: serverUrl, oauthEnabled, oauthOnly, oauthClientId, oauthIssuerUrl, rememberMeEnabled, devMode, demoMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, isLoading: configLoading, error: configError, autoSsoEnabled, embeddedMode: _embeddedMode, allowCustomJmapEndpoint } = useConfig();
+  const { appName, jmapServerUrl: configuredServerUrl, oauthEnabled, oauthOnly, oauthClientId: globalOauthClientId, oauthIssuerUrl: globalOauthIssuerUrl, oauthScopes, rememberMeEnabled, devMode, demoMode, loginLogoLightUrl, loginLogoDarkUrl, loginCompanyName, loginImprintUrl, loginPrivacyPolicyUrl, loginWebsiteUrl, loginLogoMaxHeight, loginLogoMaxWidth, loginShowHeading, loginShowSubtitle, loginShowTotp, loginShowVersion, isLoading: configLoading, error: configError, autoSsoEnabled, embeddedMode: _embeddedMode, allowCustomJmapEndpoint, jmapServers, jmapServerAutoPickByDomain } = useConfig();
   const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
+  const { activeThemeId, installedThemes } = useThemeStore(useShallow((s) => ({ activeThemeId: s.activeThemeId, installedThemes: s.installedThemes })));
+  // Active theme may carry its own brand logo (VNClagoon wordmark, SRC mark);
+  // fall back to the globally configured login logo.
+  const effLoginLogo = resolveThemeLogo(installedThemes, activeThemeId, resolvedTheme === 'dark', loginLogoLightUrl, loginLogoDarkUrl);
+
+  // Login logo sizing: when a max height/width is configured, drop the fixed
+  // 64×64 box so the logo (e.g. a wide wordmark) can render at its true size.
+  const hasLogoSize = Boolean(loginLogoMaxHeight || loginLogoMaxWidth);
+  const loginLogoStyle = hasLogoSize
+    ? { maxHeight: loginLogoMaxHeight || undefined, maxWidth: loginLogoMaxWidth || undefined }
+    : undefined;
 
   const [formData, setFormData] = useState({
     username: "",
     password: "",
   });
   const [jmapEndpoint, setJmapEndpoint] = useState("");
+  const [selectedServerId, setSelectedServerId] = useState<string | null>(null);
+  const [domainAutoLocked, setDomainAutoLocked] = useState(false);
+
+  const hasServerList = jmapServers.length > 0;
+  const selectedServer = hasServerList
+    ? jmapServers.find((s) => s.id === selectedServerId) ?? jmapServers[0]
+    : undefined;
+
+  // Effective values: per-server overrides win, then global config.
+  const serverUrl = selectedServer?.url || configuredServerUrl;
+  const effectiveOauthClientId = selectedServer?.oauth?.clientId || globalOauthClientId;
+  const effectiveOauthIssuerUrl = selectedServer?.oauth?.issuerUrl || globalOauthIssuerUrl;
   const [totpCode, setTotpCode] = useState("");
   const [showTotpField, setShowTotpField] = useState(false);
   const [rememberMe, setRememberMe] = useState(false);
@@ -100,6 +188,9 @@ export default function LoginPage() {
   const totpInputRef = useRef<HTMLInputElement>(null);
   const prevError = useRef<string | null>(null);
   const themeMenuRef = useRef<HTMLDivElement>(null);
+  // Captured by handleSubmit when in mobile handoff mode; consumed by the
+  // isAuthenticated effect to build the deep-link fragment.
+  const mobileHandoffPayloadRef = useRef<{ server_url: string; username: string; password: string } | null>(null);
 
   useEffect(() => {
     initializeTheme();
@@ -117,6 +208,27 @@ export default function LoginPage() {
     }
   }, [serverUrl, jmapEndpoint]);
 
+  // Initialize selected server when the server list arrives. Picks the first
+  // entry; the auto-pick effect below may override based on the email domain.
+  useEffect(() => {
+    if (!hasServerList) return;
+    if (selectedServerId && jmapServers.some((s) => s.id === selectedServerId)) return;
+    setSelectedServerId(jmapServers[0].id);
+  }, [hasServerList, jmapServers, selectedServerId]);
+
+  // Auto-pick by email domain. Locks the dropdown to the matched server until
+  // the user clears the email or types a domain we don't recognize.
+  useEffect(() => {
+    if (!jmapServerAutoPickByDomain || !hasServerList) return;
+    const match = findServerByDomain(jmapServers, formData.username);
+    if (match) {
+      if (selectedServerId !== match.id) setSelectedServerId(match.id);
+      setDomainAutoLocked(true);
+    } else {
+      setDomainAutoLocked(false);
+    }
+  }, [jmapServerAutoPickByDomain, hasServerList, jmapServers, formData.username, selectedServerId]);
+
   useEffect(() => {
     try {
       if (sessionStorage.getItem('session_expired') === 'true') {
@@ -158,6 +270,19 @@ export default function LoginPage() {
 
   useEffect(() => {
     if (isAuthenticated && !isAddAccountMode) {
+      // Mobile handoff: the password path completes here once the auth store
+      // flips isAuthenticated. Hand the verified credentials back to the
+      // mobile app instead of pushing to /mail. handleSubmit captured the
+      // values needed for the fragment.
+      if (isMobileHandoff && mobileHandoffPayloadRef.current) {
+        const fragment = new URLSearchParams({
+          flow: "password",
+          ...mobileHandoffPayloadRef.current,
+          state: mobileState,
+        });
+        window.location.replace(`${mobileRedirectUri}#${fragment.toString()}`);
+        return;
+      }
       let redirectTo = '/';
       try {
         const saved = sessionStorage.getItem('redirect_after_login');
@@ -166,9 +291,9 @@ export default function LoginPage() {
           redirectTo = saved;
         }
       } catch { /* ignore */ }
-      router.push(redirectTo);
+      router.push(toRouterPath(redirectTo));
     }
-  }, [isAuthenticated, router, isAddAccountMode]);
+  }, [isAuthenticated, router, isAddAccountMode, isMobileHandoff, mobileRedirectUri, mobileState]);
 
   useEffect(() => {
     clearError();
@@ -214,16 +339,29 @@ export default function LoginPage() {
 
   useEffect(() => {
     if (!oauthEnabled || !serverUrl) return;
-    discoverOAuth(oauthIssuerUrl || serverUrl)
+    setOauthDiscoveryDone(false);
+    setOauthMetadata(null);
+    const controller = new AbortController();
+    // Discover via our own origin rather than fetching the IdP's /.well-known/*
+    // documents directly from the browser. A direct cross-origin discovery
+    // fetch is subject to CORS, and providers like Authentik serve those
+    // documents without Access-Control-Allow-Origin, so the browser blocks the
+    // response and login breaks (issue #382). The proxy runs discovery server
+    // side where CORS does not apply.
+    const query = selectedServer?.id ? `?server_id=${encodeURIComponent(selectedServer.id)}` : "";
+    apiFetch(`/api/auth/oauth/metadata${query}`, { signal: controller.signal })
+      .then(async (res) => (res.ok ? ((await res.json()) as OAuthMetadata) : null))
       .then((metadata) => {
         setOauthMetadata(metadata);
         setOauthDiscoveryDone(true);
       })
-      .catch(() => {
+      .catch((err) => {
+        if (err?.name === "AbortError") return;
         setOauthMetadata(null);
         setOauthDiscoveryDone(true);
       });
-  }, [oauthEnabled, serverUrl, oauthIssuerUrl]);
+    return () => controller.abort();
+  }, [oauthEnabled, serverUrl, effectiveOauthIssuerUrl, selectedServer?.id]);
 
   // Auto-SSO: when enabled with OAUTH_ONLY, skip the login page entirely
   const ssoError = searchParams.get("sso_error");
@@ -234,11 +372,28 @@ export default function LoginPage() {
     try {
       const prefix = getPathPrefix(params.locale as string);
       const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+      // In mobile-handoff mode the callback page needs to know it should
+      // redirect into the app rather than into /mail. Stash the params in
+      // sessionStorage so the same-tab callback can read them - the SSO
+      // pending cookie carries the authoritative copy server-side too.
+      if (isMobileHandoff) {
+        try {
+          sessionStorage.setItem("mobile_redirect_uri", mobileRedirectUri);
+          sessionStorage.setItem("mobile_state", mobileState);
+        } catch { /* sessionStorage unavailable */ }
+      }
       const res = await apiFetch('/api/auth/sso/start', {
         method: 'POST',
         headers: { 'Content-Type': 'application/json' },
         credentials: 'include',
-        body: JSON.stringify({ redirect_uri: redirectUri, locale: params.locale }),
+        body: JSON.stringify({
+          redirect_uri: redirectUri,
+          locale: params.locale,
+          server_id: selectedServer?.id,
+          ...(isMobileHandoff
+            ? { mobile_redirect_uri: mobileRedirectUri, mobile_state: mobileState }
+            : {}),
+        }),
       });
 
       if (!res.ok) {
@@ -264,7 +419,7 @@ export default function LoginPage() {
     } catch {
       setOauthLoading(false);
     }
-  }, [params.locale]);
+  }, [params.locale, selectedServer?.id, isMobileHandoff, mobileRedirectUri, mobileState]);
 
   useEffect(() => {
     if (!autoSsoEnabled || !oauthOnly || !oauthDiscoveryDone || !oauthMetadata) return;
@@ -405,26 +560,56 @@ export default function LoginPage() {
   };
 
   const handleOAuthLogin = async () => {
-    if (!oauthMetadata || !oauthClientId) return;
+    if (!oauthMetadata || !effectiveOauthClientId) return;
+    // In mobile-handoff mode the client-side PKCE flow doesn't help us:
+    // tokens would land in sessionStorage on the webmail origin and the
+    // mobile app couldn't read them. Route through the server-side SSO
+    // path instead, which has the mobile-aware /api/auth/sso/complete
+    // branch.
+    if (isMobileHandoff) {
+      await startServerSideSso();
+      return;
+    }
     setOauthLoading(true);
 
     const verifier = generateCodeVerifier();
     const challenge = await generateCodeChallenge(verifier);
     const state = generateState();
-    const redirectUri = `${window.location.origin}/${params.locale}/auth/callback`;
+    const prefix = getPathPrefix(params.locale as string);
+    const redirectUri = `${window.location.origin}${prefix}/${params.locale}/auth/callback`;
+
+    // Resolve the JMAP URL to send to the callback. Server-list entries win
+    // over the custom-endpoint input, which wins over the global server URL.
+    const oauthServerUrl = selectedServer?.url
+      || (allowCustomJmapEndpoint ? jmapEndpoint : configuredServerUrl);
 
     sessionStorage.setItem("oauth_code_verifier", verifier);
     sessionStorage.setItem("oauth_state", state);
-    sessionStorage.setItem("oauth_server_url", allowCustomJmapEndpoint ? jmapEndpoint : serverUrl!);
+    sessionStorage.setItem("oauth_server_url", oauthServerUrl!);
+    if (selectedServer?.id) {
+      sessionStorage.setItem("oauth_server_id", selectedServer.id);
+    } else {
+      sessionStorage.removeItem("oauth_server_id");
+    }
     if (isAddAccountMode) {
       sessionStorage.setItem("oauth_add_account_mode", "true");
     }
 
+    // Persist the next-free cookie slot so loginWithOAuth (in stores/auth-store.ts)
+    // writes the refresh token to the correct per-account jmap_rt_<slot> cookie.
+    // loginWithOAuth reads this key but it was previously never written, so every
+    // OAuth account collapsed onto slot 0 and clobbered earlier accounts' refresh
+    // tokens. getNextCookieSlot() returns 0 when no accounts exist (correct for
+    // first sign-in) and the lowest unused slot otherwise (correct for "+ Add
+    // Account").
+    const nextSlot = useAccountStore.getState().getNextCookieSlot();
+    sessionStorage.setItem("oauth_cookie_slot", nextSlot.toString());
+
     const authUrl = new URL(oauthMetadata.authorization_endpoint);
     authUrl.searchParams.set("response_type", "code");
-    authUrl.searchParams.set("client_id", oauthClientId);
+    authUrl.searchParams.set("client_id", effectiveOauthClientId);
     authUrl.searchParams.set("redirect_uri", redirectUri);
-    authUrl.searchParams.set("scope", OAUTH_SCOPES);
+    authUrl.searchParams.set("scope", oauthScopes || "openid email profile");
     authUrl.searchParams.set("state", state);
     authUrl.searchParams.set("code_challenge", challenge);
     authUrl.searchParams.set("code_challenge_method", "S256");
@@ -435,7 +620,20 @@ export default function LoginPage() {
   const handleSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
 
-    const effectiveServerUrl = allowCustomJmapEndpoint ? jmapEndpoint : serverUrl;
+    // Server-list entries always win - `allowCustomJmapEndpoint` is only honored
+    // when the admin hasn't configured a server list.
+    const effectiveServerUrl = selectedServer?.url
+      || (allowCustomJmapEndpoint ? jmapEndpoint : serverUrl);
+    // Capture before login() so the isAuthenticated effect can build the
+    // deep-link fragment with values the user actually typed (formData may
+    // be cleared by the auth store on success).
+    if (isMobileHandoff) {
+      mobileHandoffPayloadRef.current = {
+        server_url: effectiveServerUrl,
+        username: formData.username,
+        password: formData.password,
+      };
+    }
     const success = await login(
       effectiveServerUrl,
       formData.username,
@@ -446,7 +644,15 @@ export default function LoginPage() {
 
     if (success) {
       saveUsername(formData.username);
+      if (isMobileHandoff) {
+        // The isAuthenticated effect handles the redirect; nothing else to
+        // do here. Don't push to / - that would race the deep link.
+        return;
+      }
       router.push('/');
+    } else if (isMobileHandoff) {
+      // Stale payload should never feed into a later retry's redirect.
+      mobileHandoffPayloadRef.current = null;
     }
   };
 
@@ -461,7 +667,7 @@ export default function LoginPage() {
           redirectTo = saved;
         }
       } catch { /* ignore */ }
-      router.push(redirectTo);
+      router.push(toRouterPath(redirectTo));
     }
   };
 
@@ -524,7 +730,7 @@ export default function LoginPage() {
                     )}
                   >
                     <Icon className="w-4 h-4" />
-                    <span className="flex-1 text-left">{option.label}</span>
+                    <span className="flex-1 text-start">{option.label}</span>
                     {isActive && <Check className="w-3.5 h-3.5 text-primary" />}
                   </button>
                 );
@@ -539,7 +745,7 @@ export default function LoginPage() {
             <div className="px-8 pt-12 pb-4 text-center">
               <div className="inline-flex items-center justify-center w-20 h-20 mb-6">
                 <img
-                  src={resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl}
+                  src={withBasePath(effLoginLogo)}
                   alt={appName}
                   className="max-w-20 max-h-20 object-contain"
                 />
@@ -556,13 +762,17 @@ export default function LoginPage() {
             <div className="px-8 pb-10 pt-4">
               {error && (
                 <div className={cn(
-                  "mb-5 p-3.5 bg-red-500/10 border border-red-500/20 rounded-xl flex items-start gap-3",
+                  "mb-5 p-3 rounded-xl border border-destructive/20 bg-destructive/5 flex items-start gap-3",
                   shakeError && "animate-shake"
                 )}>
-                  <AlertCircle className="w-4.5 h-4.5 text-red-500 flex-shrink-0 mt-0.5" />
-                  <p className="text-sm text-red-600 dark:text-red-400 leading-relaxed">
-                    {t(`error.${error}`) || t("error.generic")}
-                  </p>
+                  <div className="w-10 h-10 rounded-full bg-destructive/15 text-destructive flex items-center justify-center flex-shrink-0 shadow-sm">
+                    <AlertCircle className="w-5 h-5" />
+                  </div>
+                  <div className="flex-1 min-w-0 self-center">
+                    <p className="text-sm text-destructive leading-relaxed">
+                      {t(`error.${error}`) || t("error.generic")}
+                    </p>
+                  </div>
                 </div>
               )}
 
@@ -617,7 +827,7 @@ export default function LoginPage() {
                 )}
               </div>
             )}
-            <VersionBadge />
+            {loginShowVersion && <VersionBadge />}
           </div>
         </div>
       </div>
@@ -669,7 +879,7 @@ export default function LoginPage() {
                   )}
                 >
                   <Icon className="w-4 h-4" />
-                  <span className="flex-1 text-left">{option.label}</span>
+                  <span className="flex-1 text-start">{option.label}</span>
                   {isActive && <Check className="w-3.5 h-3.5 text-primary" />}
                 </button>
               );
@@ -683,19 +893,24 @@ export default function LoginPage() {
         <div className="rounded-2xl border border-border/60 bg-background/80 backdrop-blur-sm shadow-xl shadow-black/5 dark:shadow-black/20 overflow-hidden">
           {/* Header section with logo */}
           <div className="px-8 pt-10 pb-6 text-center">
-            <div className="inline-flex items-center justify-center w-16 h-16 mb-5">
+            <div className={cn("inline-flex items-center justify-center mb-5", !hasLogoSize && "w-16 h-16")}>
               <img
-                src={resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl}
+                src={withBasePath(effLoginLogo)}
                 alt={appName}
-                className="max-w-16 max-h-16 object-contain"
+                className={cn("object-contain", !hasLogoSize && "max-w-16 max-h-16")}
+                style={loginLogoStyle}
               />
             </div>
-            <h1 className="text-2xl font-semibold text-foreground tracking-tight">
-              {isAddAccountMode ? t("add_account_title") : appName}
-            </h1>
-            <p className="text-sm text-muted-foreground mt-1.5">
-              {isAddAccountMode ? t("add_account_subtitle") : (t("title") !== appName ? t("title") : "Sign in to your account")}
-            </p>
+            {loginShowHeading && (
+              <h1 className="text-2xl font-semibold text-foreground tracking-tight">
+                {isAddAccountMode ? t("add_account_title") : appName}
+              </h1>
+            )}
+            {loginShowSubtitle && (
+              <p className="text-sm text-muted-foreground mt-1.5">
+                {isAddAccountMode ? t("add_account_subtitle") : (t("title") !== appName ? t("title") : "Sign in to your account")}
+              </p>
+            )}
           </div>
 
           {/* Form section */}
@@ -703,37 +918,45 @@ export default function LoginPage() {
             {/* Session Expired Banner */}
             {sessionExpired && (
               <div
-                className="mb-5 p-3.5 bg-blue-500/10 border border-blue-500/20 rounded-xl flex items-start gap-3"
+                className="mb-5 p-3 rounded-xl border border-info/20 bg-info/5 flex items-start gap-3"
                 role="status"
                 aria-live="polite"
               >
-                <Info className="w-4.5 h-4.5 text-blue-600 dark:text-blue-400 flex-shrink-0 mt-0.5" />
-                <p className="text-sm text-blue-700 dark:text-blue-300 flex-1 leading-relaxed">
-                  {t("session_expired")}
-                </p>
-                <button
-                  type="button"
-                  onClick={() => setSessionExpired(false)}
-                  className="p-0.5 rounded-md hover:bg-blue-500/10 transition-colors flex-shrink-0"
-                  aria-label={t("dismiss")}
-                >
-                  <X className="w-4 h-4 text-blue-600 dark:text-blue-400" />
-                </button>
+                <div className="w-10 h-10 rounded-full bg-info/15 text-info flex items-center justify-center flex-shrink-0 shadow-sm">
+                  <Info className="w-5 h-5" />
+                </div>
+                <div className="flex-1 min-w-0 self-center flex items-center gap-2">
+                  <p className="text-sm text-info flex-1 leading-relaxed">
+                    {t("session_expired")}
+                  </p>
+                  <button
+                    type="button"
+                    onClick={() => setSessionExpired(false)}
+                    className="p-1 rounded-md text-info hover:bg-info/10 transition-colors flex-shrink-0"
+                    aria-label={t("dismiss")}
+                  >
+                    <X className="w-4 h-4" />
+                  </button>
+                </div>
               </div>
             )}
 
             {/* Error Message */}
             {error && (
               <div className={cn(
-                "mb-5 p-3.5 bg-red-500/10 border border-red-500/20 rounded-xl flex items-start gap-3",
+                "mb-5 p-3 rounded-xl border border-destructive/20 bg-destructive/5 flex items-start gap-3",
                 shakeError && "animate-shake"
               )}>
-                <AlertCircle className="w-4.5 h-4.5 text-red-500 flex-shrink-0 mt-0.5" />
-                <p className="text-sm text-red-600 dark:text-red-400 leading-relaxed">
-                  {error === 'invalid_credentials' && showTotpField && totpCode
-                    ? t('error.totp_invalid')
-                    : t(`error.${error}`) || t("error.generic")}
-                </p>
+                <div className="w-10 h-10 rounded-full bg-destructive/15 text-destructive flex items-center justify-center flex-shrink-0 shadow-sm">
+                  <AlertCircle className="w-5 h-5" />
+                </div>
+                <div className="flex-1 min-w-0 self-center">
+                  <p className="text-sm text-destructive leading-relaxed">
+                    {error === 'invalid_credentials' && showTotpField && totpCode
+                      ? t('error.totp_invalid')
+                      : t(`error.${error}`) || t("error.generic")}
+                  </p>
+                </div>
               </div>
             )}
 
@@ -785,11 +1008,15 @@ export default function LoginPage() {
                     )}
                   </Button>
                 ) : oauthDiscoveryDone ? (
-                  <div className="p-3.5 bg-warning/10 border border-warning/20 rounded-xl flex items-start gap-2">
-                    <AlertCircle className="w-4 h-4 text-warning flex-shrink-0 mt-0.5" />
-                    <p className="text-sm text-warning">
-                      {t("error.oauth_discovery_failed")}
-                    </p>
+                  <div className="p-3 rounded-xl border border-warning/20 bg-warning/5 flex items-start gap-3">
+                    <div className="w-10 h-10 rounded-full bg-warning/15 text-warning flex items-center justify-center flex-shrink-0 shadow-sm">
+                      <AlertCircle className="w-5 h-5" />
+                    </div>
+                    <div className="flex-1 min-w-0 self-center">
+                      <p className="text-sm text-warning leading-relaxed">
+                        {t("error.oauth_discovery_failed")}
+                      </p>
+                    </div>
                   </div>
                 ) : (
                   <div className="flex justify-center py-4">
@@ -801,8 +1028,32 @@ export default function LoginPage() {
               /* Login Form */
               <form onSubmit={handleSubmit} className="space-y-5">
                 <fieldset disabled={isLoading} className="space-y-4">
-                  {/* JMAP Endpoint field (when custom endpoints are allowed) */}
-                  {allowCustomJmapEndpoint && (
+                  {/* Server picker (when admin has configured a server list) */}
+                  {hasServerList && jmapServers.length > 1 && (
+                    <div className="space-y-1.5">
+                      <label htmlFor="jmap-server-select" className="block text-sm font-medium text-foreground">
+                        {t("jmap_server_label")}
+                      </label>
+                      <select
+                        id="jmap-server-select"
+                        value={selectedServer?.id ?? ""}
+                        onChange={(e) => setSelectedServerId(e.target.value)}
+                        disabled={domainAutoLocked}
+                        className="h-11 w-full px-3.5 bg-muted/40 border border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200 text-sm text-foreground disabled:opacity-70 disabled:cursor-not-allowed"
+                      >
+                        {jmapServers.map((s) => (
+                          <option key={s.id} value={s.id}>{s.label}</option>
+                        ))}
+                      </select>
+                      {domainAutoLocked && (
+                        <p className="text-[11px] text-muted-foreground leading-snug">
+                          {t("jmap_server_auto_picked")}
+                        </p>
+                      )}
+                    </div>
+                  )}
+                  {/* JMAP Endpoint field (only when no server list and custom endpoints are allowed) */}
+                  {!hasServerList && allowCustomJmapEndpoint && (
                     <div className="space-y-1.5">
                       <label htmlFor="jmap-endpoint" className="block text-sm font-medium text-foreground">
                         {t("jmap_endpoint_label")}
@@ -887,7 +1138,7 @@ export default function LoginPage() {
                         type={showPassword ? "text" : "password"}
                         value={formData.password}
                         onChange={(e) => setFormData({ ...formData, password: e.target.value })}
-                        className="h-11 px-3.5 pr-11 bg-muted/40 border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200"
+                        className="h-11 px-3.5 pe-11 bg-muted/40 border-border/60 rounded-xl focus:bg-background focus:border-primary/50 transition-all duration-200"
                         placeholder={t("password_placeholder")}
                         required
                         autoComplete="current-password"
@@ -908,8 +1159,12 @@ export default function LoginPage() {
                     </div>
                   </div>
 
-                  {/* 2FA toggle / field */}
+                  {/* 2FA toggle / field. The manual toggle can be hidden via
+                      LOGIN_SHOW_TOTP (loginShowTotp) for deployments whose mail
+                      server has no per-account TOTP (auth delegated to an
+                      external directory); server-required TOTP still shows. */}
                   {!showTotpField ? (
+                    loginShowTotp ? (
                     <button
                       type="button"
                       onClick={() => {
@@ -921,6 +1176,7 @@ export default function LoginPage() {
                       <Shield className="w-3.5 h-3.5" />
                       {t("totp_toggle")}
                     </button>
+                    ) : null
                   ) : (
                     <div className="space-y-1.5">
                       <label htmlFor="totp" className="block text-sm font-medium text-foreground">
@@ -1007,9 +1263,9 @@ export default function LoginPage() {
                       disabled={oauthLoading || isLoading}
                     >
                       {oauthLoading ? (
-                        <Loader2 className="w-4 h-4 animate-spin mr-2" />
+                        <Loader2 className="w-4 h-4 animate-spin me-2" />
                       ) : (
-                        <LogIn className="w-4 h-4 mr-2" />
+                        <LogIn className="w-4 h-4 me-2" />
                       )}
                       {t("sign_in_sso")}
                     </Button>
@@ -1017,11 +1273,15 @@ export default function LoginPage() {
                 )}
 
                 {oauthEnabled && oauthDiscoveryDone && !oauthMetadata && (
-                  <div className="mt-2 p-3 bg-warning/10 border border-warning/20 rounded-xl flex items-start gap-2">
-                    <AlertCircle className="w-4 h-4 text-warning flex-shrink-0 mt-0.5" />
-                    <p className="text-sm text-warning">
-                      {t("error.oauth_discovery_failed")}
-                    </p>
+                  <div className="mt-2 p-3 rounded-xl border border-warning/20 bg-warning/5 flex items-start gap-3">
+                    <div className="w-10 h-10 rounded-full bg-warning/15 text-warning flex items-center justify-center flex-shrink-0 shadow-sm">
+                      <AlertCircle className="w-5 h-5" />
+                    </div>
+                    <div className="flex-1 min-w-0 self-center">
+                      <p className="text-sm text-warning leading-relaxed">
+                        {t("error.oauth_discovery_failed")}
+                      </p>
+                    </div>
                   </div>
                 )}
               </form>
@@ -1111,7 +1371,7 @@ export default function LoginPage() {
               )}
             </div>
           )}
-          <VersionBadge />
+          {loginShowVersion && <VersionBadge />}
         </div>
       </div>
     </div>

app/(main)/[locale]/pro/page.tsx

@@ -0,0 +1,403 @@
+"use client";
+
+import { useEffect, useMemo, useRef, useState, type ComponentType, type DragEvent } from "react";
+import { useTranslations } from "next-intl";
+import { NavigationRail } from "@/components/layout/navigation-rail";
+import { KeyboardShortcutsModal } from "@/components/keyboard-shortcuts-modal";
+import { SidebarAppsModal } from "@/components/layout/sidebar-apps-modal";
+import { InlineAppView } from "@/components/layout/inline-app-view";
+import { useSidebarApps } from "@/hooks/use-sidebar-apps";
+import { useAuthStore, redirectToLogin } from "@/stores/auth-store";
+import { useEmailStore } from "@/stores/email-store";
+import { useSettingsStore } from "@/stores/settings-store";
+import { useDeviceDetection } from "@/hooks/use-media-query";
+import { EmbeddedContext } from "@/hooks/use-is-embedded";
+import { PaneSizeContext } from "@/hooks/use-pane-size";
+import { ProTabBar, PRO_TAB_DRAG_MIME } from "@/components/pro/pro-tab-bar";
+import { useProTabStore, type ProTab, type ProTabKind, type ProPaneId } from "@/stores/pro-tab-store";
+import { cn } from "@/lib/utils";
+import { getPathPrefix } from "@/lib/browser-navigation";
+
+import MailPage from "@/app/(main)/[locale]/page";
+import CalendarPage from "@/app/(main)/[locale]/calendar/page";
+import ContactsPage from "@/app/(main)/[locale]/contacts/page";
+import FilesPage from "@/app/(main)/[locale]/files/page";
+import SettingsPage from "@/app/(main)/[locale]/settings/page";
+import { ProComposeTabBody } from "@/components/pro/pro-compose-tab-body";
+import { ProEmailTabBody } from "@/components/pro/pro-email-tab-body";
+
+const APP_TAB_COMPONENTS: Partial<Record<ProTabKind, ComponentType>> = {
+  mail: MailPage,
+  calendar: CalendarPage,
+  contacts: ContactsPage,
+  files: FilesPage,
+  settings: SettingsPage,
+};
+
+type DropTarget = 'left' | 'right' | null;
+
+function renderTabBody(tab: ProTab): React.ReactNode {
+  if (tab.kind === 'compose' && tab.composeData) {
+    return <ProComposeTabBody tabId={tab.id} data={tab.composeData} />;
+  }
+  if (tab.kind === 'email' && tab.emailData) {
+    return <ProEmailTabBody tabId={tab.id} data={tab.emailData} />;
+  }
+  const Component = APP_TAB_COMPONENTS[tab.kind];
+  return Component ? <Component /> : null;
+}
+
+interface PaneProps {
+  paneId: ProPaneId;
+  tabs: ProTab[];
+  activeTabId: string | null;
+  loadedTabIds: string[];
+  onPaneFocus: (paneId: ProPaneId) => void;
+  isFocused: boolean;
+}
+
+function Pane({ paneId, tabs, activeTabId, loadedTabIds, onPaneFocus, isFocused }: PaneProps) {
+  const paneRef = useRef<HTMLDivElement | null>(null);
+  // Measured pane width, published to children via PaneSizeContext so that
+  // useDeviceDetection / useIsMobile / etc. branch on pane width - not full
+  // viewport - and inner pages collapse to their mobile/tablet layouts when
+  // the pane is narrow.
+  const [paneWidth, setPaneWidth] = useState<number | null>(null);
+
+  useEffect(() => {
+    const el = paneRef.current;
+    if (!el || typeof ResizeObserver === "undefined") return;
+    const initialRect = el.getBoundingClientRect();
+    if (initialRect.width > 0) setPaneWidth(initialRect.width);
+    const ro = new ResizeObserver((entries) => {
+      const entry = entries[0];
+      if (!entry) return;
+      const w = entry.contentRect.width;
+      setPaneWidth((prev) => (prev !== null && Math.abs(prev - w) < 0.5 ? prev : w));
+    });
+    ro.observe(el);
+    return () => ro.disconnect();
+  }, []);
+
+  return (
+    <div
+      ref={paneRef}
+      className="relative flex flex-1 flex-col overflow-hidden min-w-0 min-h-0"
+      onMouseDownCapture={() => { if (!isFocused) onPaneFocus(paneId); }}
+    >
+      <PaneSizeContext.Provider value={paneWidth}>
+        {tabs
+          .filter((tab) => loadedTabIds.includes(tab.id))
+          .map((tab) => {
+            const isActive = tab.id === activeTabId;
+            return (
+              <div
+                key={tab.id}
+                className={cn("absolute inset-0 overflow-hidden", !isActive && "hidden")}
+                aria-hidden={!isActive}
+              >
+                {renderTabBody(tab)}
+              </div>
+            );
+          })}
+      </PaneSizeContext.Provider>
+    </div>
+  );
+}
+
+export default function ProHome() {
+  const t = useTranslations();
+  const { isMobile, isTablet, isDesktop } = useDeviceDetection();
+
+  const [initialCheckDone, setInitialCheckDone] = useState(
+    () => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client
+  );
+  const [showShortcutsModal, setShowShortcutsModal] = useState(false);
+  const {
+    showAppsModal,
+    inlineApp,
+    loadedApps,
+    handleManageApps,
+    handleInlineApp,
+    closeInlineApp,
+    closeAppsModal,
+  } = useSidebarApps();
+
+  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
+  const client = useAuthStore((s) => s.client);
+  const logout = useAuthStore((s) => s.logout);
+  const checkAuth = useAuthStore((s) => s.checkAuth);
+  const authLoading = useAuthStore((s) => s.isLoading);
+  const quota = useEmailStore((s) => s.quota);
+  const isPushConnected = useEmailStore((s) => s.isPushConnected);
+  const proInterface = useSettingsStore((s) => s.proInterface);
+
+  const tabs = useProTabStore((s) => s.tabs);
+  const activeMainTabId = useProTabStore((s) => s.activeTabId);
+  const activeSplitTabId = useProTabStore((s) => s.activeSplitTabId);
+  const splitOrientation = useProTabStore((s) => s.splitOrientation);
+  const focusedPaneId = useProTabStore((s) => s.focusedPaneId);
+  const loadedTabIds = useProTabStore((s) => s.loadedTabIds);
+  const openTab = useProTabStore((s) => s.openTab);
+  const requestCloseTab = useProTabStore((s) => s.requestCloseTab);
+  const setActiveTab = useProTabStore((s) => s.setActiveTab);
+  const setFocusedPane = useProTabStore((s) => s.setFocusedPane);
+  const moveTabToPane = useProTabStore((s) => s.moveTabToPane);
+
+  const [isTabDragging, setIsTabDragging] = useState(false);
+  const [splitDropTarget, setSplitDropTarget] = useState<DropTarget>(null);
+  /** Whether the split pane visually renders before (true) or after (false) main. */
+  const [splitLeading, setSplitLeading] = useState(false);
+
+  // Auth bootstrap (mirrors standard page)
+  useEffect(() => {
+    const state = useAuthStore.getState();
+    if (state.isAuthenticated && state.client) {
+      setInitialCheckDone(true);
+      return;
+    }
+    checkAuth().finally(() => {
+      setInitialCheckDone(true);
+    });
+  }, [checkAuth]);
+
+  useEffect(() => {
+    if (initialCheckDone && !isAuthenticated && !authLoading) {
+      redirectToLogin();
+    }
+  }, [initialCheckDone, isAuthenticated, authLoading]);
+
+  useEffect(() => {
+    if (!initialCheckDone || typeof window === "undefined") return;
+    // Pro is desktop-only, and only used when the user has explicitly
+    // enabled it. If either precondition stops holding, hand the user back
+    // to the standard shell.
+    if (isMobile || isTablet || !proInterface) {
+      window.location.replace(`${getPathPrefix()}/`);
+    }
+  }, [initialCheckDone, isMobile, isTablet, proInterface]);
+
+  const mainTabs = useMemo(() => tabs.filter((t) => t.paneId === 'main'), [tabs]);
+  const splitTabs = useMemo(() => tabs.filter((t) => t.paneId === 'split'), [tabs]);
+
+  const focusedActiveTab = useMemo(() => {
+    const id = focusedPaneId === 'main' ? activeMainTabId : activeSplitTabId;
+    return tabs.find((t) => t.id === id) ?? null;
+  }, [tabs, focusedPaneId, activeMainTabId, activeSplitTabId]);
+
+  const handleRailNavigate = (itemId: 'mail' | 'calendar' | 'contacts' | 'files' | 'settings') => {
+    openTab(itemId);
+    return true;
+  };
+
+  const railActiveItemId: 'mail' | 'calendar' | 'contacts' | 'files' | 'settings' | null =
+    focusedActiveTab && (
+      focusedActiveTab.kind === 'mail' || focusedActiveTab.kind === 'calendar'
+      || focusedActiveTab.kind === 'contacts' || focusedActiveTab.kind === 'files'
+      || focusedActiveTab.kind === 'settings'
+    ) ? focusedActiveTab.kind : null;
+
+  const isSplit = splitOrientation !== null && splitTabs.length > 0;
+
+  // ---- Body-level drop targets ----
+
+  const isProTabDrag = (e: DragEvent) => e.dataTransfer.types.includes(PRO_TAB_DRAG_MIME);
+
+  const computeDropTarget = (e: DragEvent<HTMLDivElement>): DropTarget => {
+    const rect = e.currentTarget.getBoundingClientRect();
+    const xFrac = (e.clientX - rect.left) / rect.width;
+    return xFrac < 0.5 ? 'left' : 'right';
+  };
+
+  const targetPaneFromDrop = (target: DropTarget): ProPaneId | null => {
+    if (!target || !isSplit) return null;
+    const leftIsSplit = splitLeading;
+    if (target === 'left') return leftIsSplit ? 'split' : 'main';
+    return leftIsSplit ? 'main' : 'split';
+  };
+
+  const handleBodyDragOver = (e: DragEvent<HTMLDivElement>) => {
+    if (!isProTabDrag(e)) return;
+    e.preventDefault();
+    e.dataTransfer.dropEffect = "move";
+    const next = computeDropTarget(e);
+    if (next !== splitDropTarget) setSplitDropTarget(next);
+  };
+
+  const handleBodyDragLeave = (e: DragEvent<HTMLDivElement>) => {
+    const next = e.relatedTarget as Node | null;
+    if (next && e.currentTarget.contains(next)) return;
+    setSplitDropTarget(null);
+  };
+
+  const handleBodyDrop = (e: DragEvent<HTMLDivElement>) => {
+    if (!isProTabDrag(e)) return;
+    const target = computeDropTarget(e);
+    setSplitDropTarget(null);
+    setIsTabDragging(false);
+    if (!target) return;
+    e.preventDefault();
+    const draggedId = e.dataTransfer.getData(PRO_TAB_DRAG_MIME);
+    if (!draggedId) return;
+
+    if (isSplit) {
+      // Move tab to whichever pane occupies the dropped side.
+      const destPane = targetPaneFromDrop(target);
+      if (destPane) moveTabToPane(draggedId, destPane);
+      return;
+    }
+    // Create a new side-by-side split. `splitLeading` controls which side
+    // visually hosts the split pane.
+    moveTabToPane(draggedId, 'split', 'vertical');
+    setSplitLeading(target === 'left');
+  };
+
+  // Loading state (matches standard page exactly)
+  if (!initialCheckDone || authLoading || !isAuthenticated || !client) {
+    return (
+      <div className="flex h-screen items-center justify-center bg-background">
+        <div className="text-center">
+          <div className="animate-spin rounded-full h-12 w-12 border-b-2 border-foreground mx-auto"></div>
+          <p className="mt-4 text-sm text-muted-foreground">{t("common.loading")}</p>
+        </div>
+      </div>
+    );
+  }
+
+  if (!isDesktop) return null;
+
+  // Stable keys are essential: when the split collapses, the row's child
+  // list goes from [splitPane, divider, mainPane] (or the leading variant)
+  // to [mainPane]. Without keys, React would reuse the Pane instance at
+  // index 0 - repurposing the *split* pane's instance into the main pane,
+  // which strands the main pane's ResizeObserver/paneWidth on a now-
+  // unmounted DOM node and reparents the mail tab body (causing remount
+  // + stale "still-narrow" measurements after the split is closed).
+  const mainPane = (
+    <Pane
+      key="pane-main"
+      paneId="main"
+      tabs={mainTabs}
+      activeTabId={activeMainTabId}
+      loadedTabIds={loadedTabIds}
+      onPaneFocus={setFocusedPane}
+      isFocused={focusedPaneId === 'main'}
+    />
+  );
+
+  const splitPane = isSplit ? (
+    <Pane
+      key="pane-split"
+      paneId="split"
+      tabs={splitTabs}
+      activeTabId={activeSplitTabId}
+      loadedTabIds={loadedTabIds}
+      onPaneFocus={setFocusedPane}
+      isFocused={focusedPaneId === 'split'}
+    />
+  ) : null;
+
+  const splitDivider = isSplit ? (
+    <div
+      key="pane-divider"
+      aria-hidden="true"
+      className="flex-shrink-0 w-px bg-transparent"
+      style={{ borderLeft: '1px solid rgba(128, 128, 128, 0.3)' }}
+    />
+  ) : null;
+
+  // Drop-zone overlay: a single half-body preview of where the dragged tab
+  // would land. The whole body is always a drop target (the entire surface
+  // maps to one of the four sides), so we only render the active side.
+  const dropZone = isTabDragging && splitDropTarget ? (
+    <DropZone side={splitDropTarget} />
+  ) : null;
+
+  return (
+    <EmbeddedContext.Provider value={true}>
+      <div className="flex flex-col h-dvh bg-background overflow-hidden pt-[env(safe-area-inset-top)]">
+        <div className="flex flex-1 overflow-hidden">
+          {/* Leftmost Navigation Rail - identical to the standard layout */}
+          <div
+            className="w-14 bg-secondary flex flex-col flex-shrink-0"
+            style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}
+          >
+            <NavigationRail
+              collapsed
+              quota={quota}
+              isPushConnected={isPushConnected}
+              onLogout={logout}
+              onShowShortcuts={() => setShowShortcutsModal(true)}
+              onManageApps={handleManageApps}
+              onInlineApp={handleInlineApp}
+              onCloseInlineApp={closeInlineApp}
+              activeAppId={inlineApp?.id ?? null}
+              onNavigate={handleRailNavigate}
+              activeItemId={railActiveItemId}
+            />
+          </div>
+
+          {inlineApp && (
+            <InlineAppView
+              apps={loadedApps}
+              activeAppId={inlineApp.id}
+              onClose={closeInlineApp}
+              className="flex-1"
+            />
+          )}
+
+          {!inlineApp && (
+            <div className="flex flex-1 flex-col overflow-hidden min-w-0">
+              {/* Single, unified tab bar above both panes. */}
+              <ProTabBar
+                tabs={tabs}
+                activeMainTabId={activeMainTabId}
+                activeSplitTabId={activeSplitTabId}
+                onActivate={setActiveTab}
+                onClose={requestCloseTab}
+                onDragStateChange={setIsTabDragging}
+              />
+
+              {/* Panes container - accepts body drops for split/move. */}
+              <div
+                className="relative flex flex-row flex-1 overflow-hidden min-w-0"
+                onDragOver={handleBodyDragOver}
+                onDragLeave={handleBodyDragLeave}
+                onDrop={handleBodyDrop}
+              >
+                {isSplit
+                  ? (splitLeading
+                      ? <>{splitPane}{splitDivider}{mainPane}</>
+                      : <>{mainPane}{splitDivider}{splitPane}</>)
+                  : mainPane}
+
+                {dropZone}
+              </div>
+            </div>
+          )}
+        </div>
+
+        <KeyboardShortcutsModal
+          isOpen={showShortcutsModal}
+          onClose={() => setShowShortcutsModal(false)}
+        />
+        {showAppsModal && (
+          <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
+        )}
+      </div>
+    </EmbeddedContext.Provider>
+  );
+}
+
+function DropZone({ side }: { side: 'left' | 'right' }) {
+  return (
+    <div
+      aria-hidden="true"
+      className={cn(
+        "pointer-events-none absolute top-0 bottom-0 w-1/2 z-10",
+        "bg-primary/15 ring-2 ring-primary/40 ring-inset",
+        side === 'left' ? "left-0" : "right-0",
+      )}
+    />
+  );
+}

app/(main)/admin/_tabs/_jmap-servers-section.tsx

@@ -0,0 +1,259 @@
+'use client';
+
+import { useEffect, useRef, useState } from 'react';
+import { Plus, Trash2, RotateCcw, ChevronDown, ChevronRight } from 'lucide-react';
+import type { JmapServerEntry } from '@/lib/admin/jmap-servers';
+
+interface Props {
+  value: JmapServerEntry[];
+  source?: string;
+  onChange: (next: JmapServerEntry[]) => void;
+  onRevert: () => void;
+}
+
+interface RowDraft {
+  id: string;
+  label: string;
+  url: string;
+  domains: string;
+  oauthClientId: string;
+  oauthIssuerUrl: string;
+  oauthClientSecret: string;
+  oauthExpanded: boolean;
+}
+
+function entryToDraft(e: JmapServerEntry): RowDraft {
+  return {
+    id: e.id,
+    label: e.label,
+    url: e.url,
+    domains: (e.domains ?? []).join(', '),
+    oauthClientId: e.oauth?.clientId ?? '',
+    oauthIssuerUrl: e.oauth?.issuerUrl ?? '',
+    oauthClientSecret: e.oauth?.clientSecret ?? '',
+    oauthExpanded: !!(e.oauth && (e.oauth.clientId || e.oauth.issuerUrl || e.oauth.clientSecret)),
+  };
+}
+
+function draftToEntry(d: RowDraft): JmapServerEntry | null {
+  const id = d.id.trim();
+  const url = d.url.trim().replace(/\/+$/, '');
+  if (!id || !url) return null;
+  const domains = d.domains
+    .split(/[,\s]+/)
+    .map((s) => s.trim().toLowerCase())
+    .filter(Boolean);
+  const clientId = d.oauthClientId.trim();
+  const issuerUrl = d.oauthIssuerUrl.trim().replace(/\/+$/, '');
+  const clientSecret = d.oauthClientSecret;
+  const oauth = clientId || issuerUrl || clientSecret
+    ? {
+        ...(clientId ? { clientId } : {}),
+        ...(issuerUrl ? { issuerUrl } : {}),
+        ...(clientSecret ? { clientSecret } : {}),
+      }
+    : undefined;
+  return {
+    id,
+    label: d.label.trim() || id,
+    url,
+    ...(domains.length > 0 ? { domains } : {}),
+    ...(oauth ? { oauth } : {}),
+  };
+}
+
+function emptyDraft(): RowDraft {
+  return {
+    id: '',
+    label: '',
+    url: '',
+    domains: '',
+    oauthClientId: '',
+    oauthIssuerUrl: '',
+    oauthClientSecret: '',
+    oauthExpanded: false,
+  };
+}
+
+export function JmapServersSection({ value, source, onChange, onRevert }: Props) {
+  const [drafts, setDrafts] = useState<RowDraft[]>(() => value.map(entryToDraft));
+  const lastEmittedRef = useRef(value);
+
+  useEffect(() => {
+    if (value === lastEmittedRef.current) return;
+    setDrafts(value.map(entryToDraft))
+  }, [value]);
+
+  function commit(next: RowDraft[]) {
+    setDrafts(next);
+    const entries = next.map(draftToEntry).filter((e): e is JmapServerEntry => e !== null);
+    lastEmittedRef.current = entries;
+    onChange(entries);
+  }
+
+  function update(idx: number, patch: Partial<RowDraft>) {
+    commit(drafts.map((d, i) => (i === idx ? { ...d, ...patch } : d)));
+  }
+
+  function remove(idx: number) {
+    commit(drafts.filter((_, i) => i !== idx));
+  }
+
+  function add() {
+    setDrafts((prev) => [...prev, emptyDraft()]);
+    // Don't commit yet - new row needs id+url before it counts.
+  }
+
+  const ids = new Set<string>();
+  const duplicateIdx = new Set<number>();
+  drafts.forEach((d, i) => {
+    const id = d.id.trim();
+    if (!id) return;
+    if (ids.has(id)) duplicateIdx.add(i);
+    ids.add(id);
+  });
+
+  return (
+    <div className="px-4 py-3 space-y-3">
+      <div className="flex items-center justify-between gap-2">
+        <div className="min-w-0">
+          <div className="flex items-center gap-2">
+            <span className="text-sm font-medium text-foreground">Servers</span>
+            {source && source !== 'default' && (
+              <span className={`text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded ${source === 'admin' ? 'bg-primary/10 text-primary' : 'bg-muted text-muted-foreground'}`}>
+                {source}
+              </span>
+            )}
+          </div>
+          <p className="text-xs text-muted-foreground mt-0.5">
+            Each entry appears as an option on the login dropdown. Leave the list empty to fall back to the single <code className="text-[11px]">JMAP Server URL</code> above.
+          </p>
+        </div>
+        <div className="flex items-center gap-2 shrink-0">
+          {source === 'admin' && (
+            <button
+              onClick={onRevert}
+              className="text-muted-foreground hover:text-foreground"
+              title="Revert to default"
+            >
+              <RotateCcw className="w-3.5 h-3.5" />
+            </button>
+          )}
+          <button
+            onClick={add}
+            className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-xs text-foreground hover:bg-muted transition-colors"
+          >
+            <Plus className="w-3.5 h-3.5" />
+            Add server
+          </button>
+        </div>
+      </div>
+
+      {drafts.length === 0 && (
+        <div className="text-xs text-muted-foreground italic">No servers configured.</div>
+      )}
+
+      {drafts.map((d, i) => {
+        const isDuplicate = duplicateIdx.has(i);
+        return (
+          <div key={i} className="rounded-md border border-border bg-muted/20 p-3 space-y-2">
+            <div className="grid grid-cols-1 sm:grid-cols-12 gap-2 items-start">
+              <div className="sm:col-span-3">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">ID</label>
+                <input
+                  type="text"
+                  value={d.id}
+                  onChange={(e) => update(i, { id: e.target.value })}
+                  placeholder="main"
+                  className={`h-8 w-full rounded-md border bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring ${isDuplicate ? 'border-destructive' : 'border-input'}`}
+                />
+                {isDuplicate && <p className="text-[10px] text-destructive mt-0.5">Duplicate id</p>}
+              </div>
+              <div className="sm:col-span-4">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">Label</label>
+                <input
+                  type="text"
+                  value={d.label}
+                  onChange={(e) => update(i, { label: e.target.value })}
+                  placeholder="Main server"
+                  className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+              </div>
+              <div className="sm:col-span-5">
+                <label className="block text-[11px] font-medium text-muted-foreground mb-1">JMAP URL</label>
+                <div className="flex items-center gap-2">
+                  <input
+                    type="url"
+                    value={d.url}
+                    onChange={(e) => update(i, { url: e.target.value })}
+                    placeholder="https://mail.example.com"
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <button
+                    onClick={() => remove(i)}
+                    className="shrink-0 text-muted-foreground hover:text-destructive"
+                    title="Remove server"
+                  >
+                    <Trash2 className="w-3.5 h-3.5" />
+                  </button>
+                </div>
+              </div>
+            </div>
+            <div>
+              <label className="block text-[11px] font-medium text-muted-foreground mb-1">
+                Email domains (comma-separated, used for auto-pick)
+              </label>
+              <input
+                type="text"
+                value={d.domains}
+                onChange={(e) => update(i, { domains: e.target.value })}
+                placeholder="example.com, example.org"
+                className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+              />
+            </div>
+            <button
+              onClick={() => update(i, { oauthExpanded: !d.oauthExpanded })}
+              className="inline-flex items-center gap-1 text-xs text-muted-foreground hover:text-foreground"
+              type="button"
+            >
+              {d.oauthExpanded ? <ChevronDown className="w-3.5 h-3.5" /> : <ChevronRight className="w-3.5 h-3.5" />}
+              Per-server OAuth (optional, overrides global)
+            </button>
+            {d.oauthExpanded && (
+              <div className="grid grid-cols-1 sm:grid-cols-3 gap-2 ps-4 border-s border-border">
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Client ID</label>
+                  <input
+                    type="text"
+                    value={d.oauthClientId}
+                    onChange={(e) => update(i, { oauthClientId: e.target.value })}
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Issuer URL</label>
+                  <input
+                    type="url"
+                    value={d.oauthIssuerUrl}
+                    onChange={(e) => update(i, { oauthIssuerUrl: e.target.value })}
+                    placeholder="https://auth.example.com"
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+                <div>
+                  <label className="block text-[11px] font-medium text-muted-foreground mb-1">OAuth Client Secret</label>
+                  <input
+                    type="password"
+                    value={d.oauthClientSecret}
+                    onChange={(e) => update(i, { oauthClientSecret: e.target.value })}
+                    className="h-8 w-full rounded-md border border-input bg-background px-2 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                </div>
+              </div>
+            )}
+          </div>
+        );
+      })}
+    </div>
+  );
+}

app/(main)/admin/_tabs/auth.tsx

@@ -5,11 +5,15 @@ import { Save, Loader2, RotateCcw, Sparkles } from 'lucide-react';
 import { apiFetch } from '@/lib/browser-navigation';
 
 interface ConfigEntry {
-  value: unknown;
+  // Sensitive keys (sessionSecret, oauthClientSecret) come back with
+  // `value` omitted and `hasValue` set instead - the server never echoes
+  // the raw secret to the client.
+  value?: unknown;
   source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
 }
 
-export default function AdminAuthPage() {
+export function AuthTab() {
   const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
   const [edits, setEdits] = useState<Record<string, unknown>>({});
   const [loading, setLoading] = useState(true);
@@ -129,8 +133,8 @@ export default function AdminAuthPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">Authentication</h1>
           <p className="text-sm text-muted-foreground mt-1">OAuth, SSO, and session configuration</p>
         </div>
@@ -152,9 +156,8 @@ export default function AdminAuthPage() {
         </div>
       )}
 
-      {/* Auto-setup */}
       <div className="rounded-lg border border-primary/30 bg-primary/5 p-4">
-        <div className="flex items-start justify-between gap-4">
+        <div className="flex flex-col sm:flex-row sm:items-start sm:justify-between gap-3 sm:gap-4">
           <div className="min-w-0">
             <div className="flex items-center gap-2">
               <Sparkles className="w-4 h-4 text-primary shrink-0" />
@@ -176,7 +179,6 @@ export default function AdminAuthPage() {
         </div>
       </div>
 
-      {/* Auto-setup dialog */}
       {setupOpen && (
         <div
           className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-sm p-4"
@@ -265,21 +267,21 @@ export default function AdminAuthPage() {
         </div>
       )}
 
-      {/* OAuth */}
       <Section title="OAuth / OpenID Connect">
         <Toggle label="OAuth Enabled" configKey="oauthEnabled" value={currentValue('oauthEnabled') as boolean} source={config.oauthEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
         <Toggle label="OAuth Only" description="Hide password login form when enabled" configKey="oauthOnly" value={currentValue('oauthOnly') as boolean} source={config.oauthOnly?.source} onChange={handleChange} onRevert={handleRevert} />
         <Text label="OAuth Client ID" configKey="oauthClientId" value={currentValue('oauthClientId') as string} source={config.oauthClientId?.source} onChange={handleChange} onRevert={handleRevert} />
-        <Text label="OAuth Client Secret" configKey="oauthClientSecret" value={currentValue('oauthClientSecret') as string} source={config.oauthClientSecret?.source} onChange={handleChange} onRevert={handleRevert} type="password" />
+        <Text label="OAuth Client Secret" configKey="oauthClientSecret" value={currentValue('oauthClientSecret') as string} source={config.oauthClientSecret?.source} onChange={handleChange} onRevert={handleRevert} type="password" placeholder={config.oauthClientSecret?.hasValue ? '••••••••  (saved - type to replace)' : undefined} />
         <Text label="OAuth Issuer URL" configKey="oauthIssuerUrl" value={currentValue('oauthIssuerUrl') as string} source={config.oauthIssuerUrl?.source} onChange={handleChange} onRevert={handleRevert} placeholder="https://auth.example.com" />
+        <Toggle label="Allow private OAuth endpoints" description="Permit discovery to resolve to RFC-1918 / loopback hosts. Enable only for split-DNS deployments where the mail server's public hostname resolves to an internal IP." configKey="oauthAllowPrivateEndpoints" value={currentValue('oauthAllowPrivateEndpoints') as boolean} source={config.oauthAllowPrivateEndpoints?.source} onChange={handleChange} onRevert={handleRevert} />
+        <Text label="OAuth Scopes" description="Space-separated scopes that replace the defaults. Leave blank to use the built-in scope list." configKey="oauthScopes" value={currentValue('oauthScopes') as string} source={config.oauthScopes?.source} onChange={handleChange} onRevert={handleRevert} placeholder="openid email offline_access" />
+        <Text label="OAuth Extra Scopes" description="Additional space-separated scopes appended to the defaults." configKey="oauthExtraScopes" value={currentValue('oauthExtraScopes') as string} source={config.oauthExtraScopes?.source} onChange={handleChange} onRevert={handleRevert} placeholder="urn:ietf:params:oauth:..." />
       </Section>
 
-      {/* SSO */}
       <Section title="Single Sign-On">
         <Toggle label="Auto SSO" description="Automatically redirect to SSO provider on load" configKey="autoSsoEnabled" value={currentValue('autoSsoEnabled') as boolean} source={config.autoSsoEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
       </Section>
 
-      {/* Session & Security */}
       <Section title="Session & Security">
         <Select label="Cookie SameSite" configKey="cookieSameSite" value={currentValue('cookieSameSite') as string} source={config.cookieSameSite?.source} options={['lax', 'strict', 'none']} onChange={handleChange} onRevert={handleRevert} />
         <Text label="Allowed Frame Ancestors" configKey="allowedFrameAncestors" value={currentValue('allowedFrameAncestors') as string} source={config.allowedFrameAncestors?.source} onChange={handleChange} onRevert={handleRevert} placeholder="'none' or https://..." />
@@ -314,7 +316,7 @@ function Text({ label, description, configKey, value, source, onChange, onRevert
   onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void; placeholder?: string; type?: string;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
       <div className="min-w-0">
         <div className="flex items-center gap-2">
           <span className="text-sm text-foreground">{label}</span>
@@ -322,11 +324,11 @@ function Text({ label, description, configKey, value, source, onChange, onRevert
         </div>
         {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 w-full sm:w-auto">
         <input type={type} value={value ?? ''} onChange={(e) => onChange(configKey, e.target.value)} placeholder={placeholder}
-          className="h-8 w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring" />
+          className="h-8 w-full sm:w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring" />
         {source === 'admin' && (
-          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert"><RotateCcw className="w-3.5 h-3.5" /></button>
+          <button onClick={() => onRevert(configKey)} className="shrink-0 text-muted-foreground hover:text-foreground" title="Revert"><RotateCcw className="w-3.5 h-3.5" /></button>
         )}
       </div>
     </div>
@@ -338,7 +340,7 @@ function Toggle({ label, description, configKey, value, source, onChange, onReve
   onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
       <div className="min-w-0">
         <div className="flex items-center gap-2">
           <span className="text-sm text-foreground">{label}</span>
@@ -346,7 +348,7 @@ function Toggle({ label, description, configKey, value, source, onChange, onReve
         </div>
         {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 shrink-0">
         <button onClick={() => onChange(configKey, !value)}
           className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${value ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
           <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${value ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
@@ -364,12 +366,12 @@ function Select({ label, configKey, value, source, options, onChange, onRevert }
   onChange: (k: string, v: unknown) => void; onRevert: (k: string) => void;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
-      <div className="flex items-center gap-2">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="flex items-center gap-2 min-w-0">
         <span className="text-sm text-foreground">{label}</span>
         <SourceBadge source={source} />
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 shrink-0">
         <select value={value ?? ''} onChange={(e) => onChange(configKey, e.target.value)}
           className="h-8 rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring">
           {options.map(o => <option key={o} value={o}>{o}</option>)}

app/(main)/admin/_tabs/branding.tsx

@@ -0,0 +1,721 @@
+'use client';
+
+import { useEffect, useMemo, useRef, useState } from 'react';
+import { Save, Loader2, RotateCcw, ImageIcon, Upload, Trash2, Globe, Plus, X } from 'lucide-react';
+import { apiFetch, withBasePath } from '@/lib/browser-navigation';
+import {
+  BRANDING_OVERRIDE_KEYS,
+  parseDomainBranding,
+  type BrandingOverrideKey,
+  type DomainBrandingEntry,
+} from '@/lib/admin/domain-branding';
+
+interface ConfigEntry {
+  value?: unknown;
+  source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
+}
+
+const IMAGE_FIELDS = [
+  { key: 'faviconUrl', label: 'Favicon', accept: '.svg,.png,.ico,.webp' },
+  { key: 'appLogoLightUrl', label: 'App Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'appLogoDarkUrl', label: 'App Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'loginLogoLightUrl', label: 'Login Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'loginLogoDarkUrl', label: 'Login Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
+] as const;
+
+const TEXT_FIELDS = [
+  { key: 'loginCompanyName', label: 'Company Name' },
+  { key: 'loginImprintUrl', label: 'Imprint URL' },
+  { key: 'loginPrivacyPolicyUrl', label: 'Privacy Policy URL' },
+  { key: 'loginWebsiteUrl', label: 'Company Website URL' },
+] as const;
+
+const PWA_IMAGE_FIELDS = [
+  { key: 'pwaIconUrl', label: 'PWA Icon', accept: '.svg,.png,.jpg,.webp' },
+  { key: 'pwaScreenshotMobileUrl', label: 'PWA Screenshot (Mobile)', accept: '.png,.jpg,.webp' },
+  { key: 'pwaScreenshotDesktopUrl', label: 'PWA Screenshot (Desktop)', accept: '.png,.jpg,.webp' },
+] as const;
+
+const PWA_TEXT_FIELDS = [
+  { key: 'appShortName', label: 'Short Name', placeholder: 'Shown on home screen (max ~12 chars)' },
+  { key: 'appDescription', label: 'Description', placeholder: 'App description for install prompts' },
+] as const;
+
+const PWA_COLOR_FIELDS = [
+  { key: 'pwaThemeColor', label: 'Theme Color', defaultValue: '#ffffff' },
+  { key: 'pwaBackgroundColor', label: 'Background Color', defaultValue: '#ffffff' },
+] as const;
+
+// Accepts exact hosts and one-level wildcards (e.g. *.example.com).
+const HOST_RE = /^(\*\.)?[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/;
+// Tighter rule for uploads: wildcards can only point to externally-hosted
+// URLs, since we'd have no concrete subdomain to serve a file from.
+const EXACT_HOST_RE = /^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/;
+
+export function BrandingTab() {
+  const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
+  const [edits, setEdits] = useState<Record<string, string>>({});
+  const [loading, setLoading] = useState(true);
+  const [saving, setSaving] = useState(false);
+  const [uploading, setUploading] = useState<string | null>(null);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [selectedHost, setSelectedHost] = useState<string | null>(null);
+  const [addingHost, setAddingHost] = useState(false);
+  const [newHostInput, setNewHostInput] = useState('');
+  const [newHostError, setNewHostError] = useState<string | null>(null);
+  const fileInputRefs = useRef<Record<string, HTMLInputElement | null>>({});
+
+  useEffect(() => {
+    fetchConfig();
+  }, []);
+
+  const domainEntries = useMemo<DomainBrandingEntry[]>(
+    () => parseDomainBranding(config['domainBranding']?.value),
+    [config],
+  );
+
+  // Drop selection if the host disappeared from the config (e.g. concurrent edit).
+  useEffect(() => {
+    if (selectedHost && !domainEntries.some(e => e.host === selectedHost)) {
+      setSelectedHost(null);
+      setEdits({});
+    }
+  }, [domainEntries, selectedHost]);
+
+  async function fetchConfig() {
+    setLoading(true);
+    const res = await apiFetch('/api/admin/config');
+    if (res.ok) setConfig(await res.json());
+    setLoading(false);
+  }
+
+  function selectedEntry(): DomainBrandingEntry | null {
+    if (!selectedHost) return null;
+    return domainEntries.find(e => e.host === selectedHost) ?? null;
+  }
+
+  function handleChange(key: string, value: string) {
+    setEdits(prev => ({ ...prev, [key]: value }));
+    setMessage(null);
+  }
+
+  function currentValue(key: string): string {
+    if (key in edits) return edits[key];
+    if (selectedHost) {
+      const entry = selectedEntry();
+      return (entry?.[key as BrandingOverrideKey] as string | undefined) ?? '';
+    }
+    return (config[key]?.value as string) ?? '';
+  }
+
+  function isOverriddenInScope(key: string): boolean {
+    if (selectedHost) {
+      const entry = selectedEntry();
+      const v = entry?.[key as BrandingOverrideKey];
+      return typeof v === 'string' && v.length > 0;
+    }
+    return config[key]?.source === 'admin';
+  }
+
+  const isUploadedFile = (key: string): boolean => {
+    const val = currentValue(key);
+    return val.startsWith('/api/admin/branding/');
+  };
+
+  function buildUpdatedDomainBranding(merge: Record<string, string>): DomainBrandingEntry[] {
+    if (!selectedHost) return domainEntries;
+    const next = domainEntries.slice();
+    const idx = next.findIndex(e => e.host === selectedHost);
+    const base: DomainBrandingEntry =
+      idx === -1 ? { host: selectedHost } : { ...next[idx] };
+    const writable = base as unknown as Record<string, string | undefined>;
+    for (const [key, value] of Object.entries(merge)) {
+      if (!(BRANDING_OVERRIDE_KEYS as readonly string[]).includes(key)) continue;
+      if (typeof value === 'string' && value.length > 0) {
+        writable[key] = value;
+      } else {
+        delete writable[key];
+      }
+    }
+    if (idx === -1) next.push(base);
+    else next[idx] = base;
+    return next;
+  }
+
+  async function handleSave() {
+    if (Object.keys(edits).length === 0) return;
+    setSaving(true);
+    setMessage(null);
+
+    const payload = selectedHost
+      ? { domainBranding: buildUpdatedDomainBranding(edits) }
+      : edits;
+
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(payload),
+    });
+
+    if (res.ok) {
+      setMessage({
+        type: 'success',
+        text: selectedHost
+          ? `Branding for ${selectedHost} updated. Changes visible on next page load.`
+          : 'Branding updated. Changes visible on next page load.',
+      });
+      setEdits({});
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to save' });
+    }
+    setSaving(false);
+  }
+
+  async function handleUpload(slot: string, file: File) {
+    if (selectedHost && !EXACT_HOST_RE.test(selectedHost)) {
+      setMessage({
+        type: 'error',
+        text: 'Wildcard hosts cannot upload files. Enter a URL instead.',
+      });
+      return;
+    }
+    setUploading(slot);
+    setMessage(null);
+
+    const formData = new FormData();
+    formData.append('file', file);
+    formData.append('slot', slot);
+    if (selectedHost) formData.append('host', selectedHost);
+
+    const res = await apiFetch('/api/admin/branding', {
+      method: 'POST',
+      body: formData,
+    });
+
+    if (res.ok) {
+      const data = await res.json();
+      setMessage({ type: 'success', text: `Uploaded ${file.name} successfully.` });
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[slot];
+        return next;
+      });
+      // Refresh from server so domainBranding entries reflect the upload.
+      await fetchConfig();
+      void data;
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Upload failed' });
+    }
+    setUploading(null);
+  }
+
+  async function handleDeleteUpload(slot: string) {
+    setMessage(null);
+
+    const body: { slot: string; host?: string } = { slot };
+    if (selectedHost) body.host = selectedHost;
+
+    const res = await apiFetch('/api/admin/branding', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(body),
+    });
+
+    if (res.ok) {
+      setMessage({ type: 'success', text: 'Uploaded file removed. Reverted to default.' });
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[slot];
+        return next;
+      });
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to remove' });
+    }
+  }
+
+  async function handleRevert(key: string) {
+    if (selectedHost) {
+      // Domain scope: drop the field from the entry and PATCH the array.
+      const updated = buildUpdatedDomainBranding({ [key]: '' });
+      const res = await apiFetch('/api/admin/config', {
+        method: 'PATCH',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ domainBranding: updated }),
+      });
+      if (res.ok) {
+        setEdits(prev => {
+          const next = { ...prev };
+          delete next[key];
+          return next;
+        });
+        await fetchConfig();
+      }
+      return;
+    }
+    // Default scope: revert via DELETE /api/admin/config
+    const res = await apiFetch('/api/admin/config', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ key }),
+    });
+    if (res.ok) {
+      setEdits(prev => {
+        const next = { ...prev };
+        delete next[key];
+        return next;
+      });
+      await fetchConfig();
+    }
+  }
+
+  async function handleAddDomain() {
+    const host = newHostInput.trim().toLowerCase().replace(/\.+$/, '');
+    if (!host) {
+      setNewHostError('Enter a hostname');
+      return;
+    }
+    if (!HOST_RE.test(host)) {
+      setNewHostError('Invalid hostname. Use foo.example.com or *.example.com');
+      return;
+    }
+    if (domainEntries.some(e => e.host === host)) {
+      setNewHostError('A branding entry for this host already exists');
+      return;
+    }
+    setNewHostError(null);
+
+    const next: DomainBrandingEntry[] = [...domainEntries, { host }];
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ domainBranding: next }),
+    });
+    if (res.ok) {
+      setNewHostInput('');
+      setAddingHost(false);
+      setSelectedHost(host);
+      setEdits({});
+      await fetchConfig();
+    } else {
+      const data = await res.json();
+      setNewHostError(data.error || 'Failed to add domain');
+    }
+  }
+
+  async function handleDeleteDomain() {
+    if (!selectedHost) return;
+    if (!confirm(`Remove branding entry for ${selectedHost}? Uploaded files for this domain will be left behind on disk.`)) {
+      return;
+    }
+    const next = domainEntries.filter(e => e.host !== selectedHost);
+    const res = await apiFetch('/api/admin/config', {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ domainBranding: next }),
+    });
+    if (res.ok) {
+      setSelectedHost(null);
+      setEdits({});
+      await fetchConfig();
+      setMessage({ type: 'success', text: `Removed branding entry for ${selectedHost}.` });
+    } else {
+      const data = await res.json();
+      setMessage({ type: 'error', text: data.error || 'Failed to remove domain' });
+    }
+  }
+
+  function handleScopeChange(host: string | null) {
+    if (Object.keys(edits).length > 0 && !confirm('Discard unsaved changes?')) return;
+    setSelectedHost(host);
+    setEdits({});
+    setMessage(null);
+  }
+
+  const hasEdits = Object.keys(edits).length > 0;
+  const wildcardScope = !!selectedHost && !EXACT_HOST_RE.test(selectedHost);
+
+  if (loading) {
+    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
+  }
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Branding</h1>
+          <p className="text-sm text-muted-foreground mt-1">Customize logos, favicon, and company information</p>
+        </div>
+        {hasEdits && (
+          <button
+            onClick={handleSave}
+            disabled={saving}
+            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+          >
+            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
+            Save changes
+          </button>
+        )}
+      </div>
+
+      {/* Scope picker */}
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30 flex items-center gap-2">
+          <Globe className="w-4 h-4 text-muted-foreground" />
+          <h2 className="text-sm font-medium text-foreground">Scope</h2>
+        </div>
+        <div className="px-4 py-3 space-y-3">
+          <div className="flex flex-wrap gap-2">
+            <button
+              type="button"
+              onClick={() => handleScopeChange(null)}
+              className={`h-8 px-3 rounded-md text-sm font-medium transition-colors ${
+                selectedHost === null
+                  ? 'bg-primary text-primary-foreground'
+                  : 'bg-muted text-foreground hover:bg-muted/70'
+              }`}
+            >
+              Default
+            </button>
+            {domainEntries.map(entry => (
+              <button
+                key={entry.host}
+                type="button"
+                onClick={() => handleScopeChange(entry.host)}
+                className={`h-8 px-3 rounded-md text-sm font-medium transition-colors ${
+                  selectedHost === entry.host
+                    ? 'bg-primary text-primary-foreground'
+                    : 'bg-muted text-foreground hover:bg-muted/70'
+                }`}
+              >
+                {entry.host}
+              </button>
+            ))}
+            {!addingHost && (
+              <button
+                type="button"
+                onClick={() => { setAddingHost(true); setNewHostError(null); }}
+                className="inline-flex items-center gap-1 h-8 px-3 rounded-md border border-dashed border-input text-sm text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
+              >
+                <Plus className="w-3.5 h-3.5" />
+                Add domain
+              </button>
+            )}
+          </div>
+          {addingHost && (
+            <div className="flex flex-wrap items-center gap-2">
+              <input
+                type="text"
+                autoFocus
+                value={newHostInput}
+                onChange={(e) => { setNewHostInput(e.target.value); setNewHostError(null); }}
+                onKeyDown={(e) => { if (e.key === 'Enter') void handleAddDomain(); }}
+                placeholder="mail.example.com or *.example.com"
+                className="h-8 w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+              />
+              <button
+                type="button"
+                onClick={handleAddDomain}
+                className="h-8 px-3 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 transition-colors"
+              >
+                Add
+              </button>
+              <button
+                type="button"
+                onClick={() => { setAddingHost(false); setNewHostInput(''); setNewHostError(null); }}
+                className="h-8 px-2.5 rounded-md text-sm text-muted-foreground hover:text-foreground transition-colors"
+              >
+                Cancel
+              </button>
+              {newHostError && <span className="text-xs text-destructive">{newHostError}</span>}
+            </div>
+          )}
+          {selectedHost ? (
+            <div className="flex items-center justify-between gap-3 text-xs">
+              <p className="text-muted-foreground">
+                Editing overrides for <span className="font-mono text-foreground">{selectedHost}</span>.
+                Unset fields fall back to the Default values.
+                {wildcardScope && ' Uploads are disabled for wildcard hosts; enter a URL instead.'}
+              </p>
+              <button
+                type="button"
+                onClick={handleDeleteDomain}
+                className="inline-flex items-center gap-1 text-destructive hover:underline whitespace-nowrap"
+              >
+                <X className="w-3.5 h-3.5" />
+                Remove domain
+              </button>
+            </div>
+          ) : (
+            <p className="text-xs text-muted-foreground">
+              Editing the Default branding. Add a domain to override branding when the webmail is served on a specific hostname.
+            </p>
+          )}
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Images & Logos</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Upload a file or enter a URL. Supported formats: SVG, PNG, JPEG, WebP, ICO (max 2 MB)</p>
+        </div>
+        <div className="divide-y divide-border">
+          {IMAGE_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3">
+              <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {isOverriddenInScope(field.key) && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                      {isUploadedFile(field.key) ? 'uploaded' : selectedHost ? 'domain' : 'admin'}
+                    </span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder={selectedHost ? 'Enter URL (uploads only for default scope)' : 'Enter URL or upload a file'}
+                    className="h-8 w-full sm:w-64 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <input
+                    ref={el => { fileInputRefs.current[field.key] = el; }}
+                    type="file"
+                    accept={field.accept}
+                    className="hidden"
+                    onChange={(e) => {
+                      const file = e.target.files?.[0];
+                      if (file) handleUpload(field.key, file);
+                      e.target.value = '';
+                    }}
+                  />
+                  <button
+                    onClick={() => fileInputRefs.current[field.key]?.click()}
+                    disabled={uploading === field.key || wildcardScope}
+                    className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+                    title={wildcardScope ? 'Uploads disabled for wildcard hosts' : 'Upload file'}
+                  >
+                    {uploading === field.key ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <Upload className="w-3.5 h-3.5" />}
+                  </button>
+                  {isUploadedFile(field.key) && (
+                    <button
+                      onClick={() => handleDeleteUpload(field.key)}
+                      className="text-muted-foreground hover:text-destructive transition-colors"
+                      title="Remove uploaded file"
+                    >
+                      <Trash2 className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                  {isOverriddenInScope(field.key) && !isUploadedFile(field.key) && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+              {currentValue(field.key) && (
+                <div className="mt-2 flex items-center gap-2">
+                  <ImageIcon className="w-3.5 h-3.5 text-muted-foreground" />
+                  <div className="h-8 w-auto bg-muted rounded flex items-center justify-center px-2">
+                    <img
+                      src={withBasePath(currentValue(field.key))}
+                      alt={field.label}
+                      className="max-h-6 max-w-[200px] object-contain"
+                      onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+                    />
+                  </div>
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Progressive Web App</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Shown when users install the webmail to their home screen. Leave fields blank to fall back to the favicon and app name.</p>
+        </div>
+        <div className="divide-y divide-border">
+          {PWA_IMAGE_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3">
+              <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {isOverriddenInScope(field.key) && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                      {isUploadedFile(field.key) ? 'uploaded' : selectedHost ? 'domain' : 'admin'}
+                    </span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder={selectedHost ? 'Enter URL (uploads only for default scope)' : 'Enter URL or upload a file'}
+                    className="h-8 w-full sm:w-64 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  <input
+                    ref={el => { fileInputRefs.current[field.key] = el; }}
+                    type="file"
+                    accept={field.accept}
+                    className="hidden"
+                    onChange={(e) => {
+                      const file = e.target.files?.[0];
+                      if (file) handleUpload(field.key, file);
+                      e.target.value = '';
+                    }}
+                  />
+                  <button
+                    onClick={() => fileInputRefs.current[field.key]?.click()}
+                    disabled={uploading === field.key || wildcardScope}
+                    className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
+                    title={wildcardScope ? 'Uploads disabled for wildcard hosts' : 'Upload file'}
+                  >
+                    {uploading === field.key ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <Upload className="w-3.5 h-3.5" />}
+                  </button>
+                  {isUploadedFile(field.key) && (
+                    <button
+                      onClick={() => handleDeleteUpload(field.key)}
+                      className="text-muted-foreground hover:text-destructive transition-colors"
+                      title="Remove uploaded file"
+                    >
+                      <Trash2 className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                  {isOverriddenInScope(field.key) && !isUploadedFile(field.key) && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+              {currentValue(field.key) && (
+                <div className="mt-2 flex items-center gap-2">
+                  <ImageIcon className="w-3.5 h-3.5 text-muted-foreground" />
+                  <div className="h-8 w-auto bg-muted rounded flex items-center justify-center px-2">
+                    <img
+                      src={withBasePath(currentValue(field.key))}
+                      alt={field.label}
+                      className="max-h-6 max-w-[200px] object-contain"
+                      onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
+                    />
+                  </div>
+                </div>
+              )}
+            </div>
+          ))}
+          {PWA_TEXT_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="flex items-center gap-2 min-w-0">
+                <label className="text-sm text-foreground">{field.label}</label>
+                {isOverriddenInScope(field.key) && (
+                  <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                    {selectedHost ? 'domain' : 'admin'}
+                  </span>
+                )}
+              </div>
+              <div className="flex items-center gap-2 w-full sm:w-auto">
+                <input
+                  type="text"
+                  value={currentValue(field.key)}
+                  onChange={(e) => handleChange(field.key, e.target.value)}
+                  placeholder={field.placeholder}
+                  className="h-8 w-full sm:w-72 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                {isOverriddenInScope(field.key) && (
+                  <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                    <RotateCcw className="w-3.5 h-3.5" />
+                  </button>
+                )}
+              </div>
+            </div>
+          ))}
+          {PWA_COLOR_FIELDS.map(field => {
+            const value = currentValue(field.key) || field.defaultValue;
+            return (
+              <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="flex items-center gap-2 min-w-0">
+                  <label className="text-sm text-foreground">{field.label}</label>
+                  {isOverriddenInScope(field.key) && (
+                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                      {selectedHost ? 'domain' : 'admin'}
+                    </span>
+                  )}
+                </div>
+                <div className="flex items-center gap-2 w-full sm:w-auto">
+                  <input
+                    type="color"
+                    value={/^#[0-9a-fA-F]{6}$/.test(value) ? value : field.defaultValue}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    className="h-8 w-10 cursor-pointer rounded-md border border-input bg-background p-0.5"
+                    title="Pick a color"
+                  />
+                  <input
+                    type="text"
+                    value={currentValue(field.key)}
+                    onChange={(e) => handleChange(field.key, e.target.value)}
+                    placeholder={field.defaultValue}
+                    className="h-8 w-full sm:w-32 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm font-mono text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                  />
+                  {isOverriddenInScope(field.key) && (
+                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                      <RotateCcw className="w-3.5 h-3.5" />
+                    </button>
+                  )}
+                </div>
+              </div>
+            );
+          })}
+        </div>
+      </div>
+
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Company Information</h2>
+        </div>
+        <div className="divide-y divide-border">
+          {TEXT_FIELDS.map(field => (
+            <div key={field.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="flex items-center gap-2 min-w-0">
+                <label className="text-sm text-foreground">{field.label}</label>
+                {isOverriddenInScope(field.key) && (
+                  <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
+                    {selectedHost ? 'domain' : 'admin'}
+                  </span>
+                )}
+              </div>
+              <div className="flex items-center gap-2 w-full sm:w-auto">
+                <input
+                  type="text"
+                  value={currentValue(field.key)}
+                  onChange={(e) => handleChange(field.key, e.target.value)}
+                  placeholder={field.key.includes('Url') ? 'https://...' : 'Enter value'}
+                  className="h-8 w-full sm:w-72 min-w-0 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+                />
+                {isOverriddenInScope(field.key) && (
+                  <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+                    <RotateCcw className="w-3.5 h-3.5" />
+                  </button>
+                )}
+              </div>
+            </div>
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

app/(main)/admin/_tabs/dashboard.tsx

@@ -22,23 +22,23 @@ interface ConfigData {
   devMode?: boolean;
 }
 
-export default function AdminDashboardPage() {
+export function DashboardTab() {
   const [status, setStatus] = useState<AdminStatus | null>(null);
   const [recentActivity, setRecentActivity] = useState<AuditEntry[]>([]);
   const [config, setConfig] = useState<ConfigData | null>(null);
-  const [, setConfigSources] = useState<Record<string, { value: unknown; source: string }> | null>(null);
+  const [, setConfigSources] = useState<Record<string, { value?: unknown; source: string; hasValue?: boolean }> | null>(null);
   const [warnings, setWarnings] = useState<string[]>([]);
   const [pluginCount, setPluginCount] = useState(0);
   const [themeCount, setThemeCount] = useState(0);
   const [policyRuleCount, setPolicyRuleCount] = useState(0);
-  const [jmapHealth, setJmapHealth] = useState<'unknown' | 'ok' | 'error'>('unknown');
+  const [accountCounts, setAccountCounts] = useState<{ total: number; active7d: number } | null>(null);
 
   useEffect(() => {
     fetchDashboardData();
   }, []);
 
   async function fetchDashboardData() {
-    const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes] = await Promise.all([
+    const [statusRes, auditRes, configRes, adminConfigRes, pluginRes, themeRes, policyRes, telemetryRes] = await Promise.all([
       apiFetch('/api/admin/auth'),
       apiFetch('/api/admin/audit?limit=10'),
       apiFetch('/api/config'),
@@ -46,6 +46,7 @@ export default function AdminDashboardPage() {
       apiFetch('/api/admin/plugins').catch(() => null),
       apiFetch('/api/admin/themes').catch(() => null),
       apiFetch('/api/admin/policy').catch(() => null),
+      apiFetch('/api/admin/telemetry').catch(() => null),
     ]);
 
     if (statusRes.ok) setStatus(await statusRes.json());
@@ -73,13 +74,10 @@ export default function AdminDashboardPage() {
       const disabledGates = policy.features ? Object.values(policy.features).filter((v: unknown) => !v).length : 0;
       setPolicyRuleCount(restrictionCount + disabledGates);
     }
-
-    if (configData?.jmapServerUrl) {
-      try {
-        const jmapRes = await apiFetch('/api/config');
-        setJmapHealth(jmapRes.ok ? 'ok' : 'error');
-      } catch {
-        setJmapHealth('error');
+    if (telemetryRes?.ok) {
+      const telemetry = await telemetryRes.json();
+      if (telemetry.accountCounts && typeof telemetry.accountCounts.total === 'number') {
+        setAccountCounts(telemetry.accountCounts);
       }
     }
 
@@ -88,7 +86,9 @@ export default function AdminDashboardPage() {
       const sources = await adminConfigRes.json();
       setConfigSources(sources);
       const sessionSecret = sources?.sessionSecret;
-      if (!sessionSecret?.value || sessionSecret.value === 'your-secret-key-here') {
+      // Server redacts the raw value for sensitive keys; rely on hasValue,
+      // which is false when unset or matching a known placeholder default.
+      if (!sessionSecret?.hasValue) {
         w.push('SESSION_SECRET is not set or using a default value. Sessions are insecure.');
       }
       const adminPassword = sources?.adminPassword;
@@ -104,7 +104,6 @@ export default function AdminDashboardPage() {
 
   return (
     <div className="max-w-3xl space-y-8">
-      {/* Warnings */}
       {warnings.map((msg, i) => (
         <div key={i} className="flex items-start gap-3 rounded-lg border border-warning/20 bg-warning/10 p-4">
           <AlertTriangle className="w-5 h-5 text-warning mt-0.5 shrink-0" />
@@ -112,19 +111,6 @@ export default function AdminDashboardPage() {
         </div>
       ))}
 
-      {status && !status.lastLogin && (
-        <div className="flex items-start gap-3 rounded-lg border border-warning/20 bg-warning/10 p-4">
-          <AlertTriangle className="w-5 h-5 text-warning mt-0.5 shrink-0" />
-          <div>
-            <p className="text-sm font-medium text-warning">First login detected</p>
-            <p className="text-sm text-warning/80 mt-0.5">
-              Remember to remove ADMIN_PASSWORD from your .env file now that the hash is stored securely.
-            </p>
-          </div>
-        </div>
-      )}
-
-      {/* Server Info */}
       <SettingsSection title="Server" description="Application and connection details">
         <SettingItem label="Application">
           <span className="text-sm text-foreground">{config?.appName || '-'}</span>
@@ -132,16 +118,6 @@ export default function AdminDashboardPage() {
         <SettingItem label="JMAP Server" description={jmapUrl !== '-' ? jmapUrl : undefined}>
           <span className="text-sm text-foreground">{jmapHostname}</span>
         </SettingItem>
-        <SettingItem label="JMAP Connection">
-          <span className={`inline-flex items-center gap-1.5 text-sm font-medium ${
-            jmapHealth === 'ok' ? 'text-green-600 dark:text-green-400' : jmapHealth === 'error' ? 'text-red-600 dark:text-red-400' : 'text-muted-foreground'
-          }`}>
-            <span className={`w-2 h-2 rounded-full ${
-              jmapHealth === 'ok' ? 'bg-green-500' : jmapHealth === 'error' ? 'bg-red-500' : 'bg-muted-foreground/40'
-            }`} />
-            {jmapHealth === 'ok' ? 'Connected' : jmapHealth === 'error' ? 'Error' : 'Unknown'}
-          </span>
-        </SettingItem>
         <SettingItem label="Last Login">
           <span className="text-sm text-foreground">
             {status?.lastLogin ? new Date(status.lastLogin).toLocaleString() : 'Never'}
@@ -149,7 +125,6 @@ export default function AdminDashboardPage() {
         </SettingItem>
       </SettingsSection>
 
-      {/* Features */}
       <SettingsSection title="Features" description="Enabled integrations and modules">
         <SettingItem label="Admin Panel" description="Administrative access to server configuration">
           <ToggleSwitch checked={!!status?.enabled} onChange={() => {}} disabled />
@@ -165,7 +140,15 @@ export default function AdminDashboardPage() {
         </SettingItem>
       </SettingsSection>
 
-      {/* Extensions */}
+      <SettingsSection title="Accounts" description="Unique logins recorded over the last 90 days">
+        <SettingItem label="Total accounts" description="Distinct identities seen in the retention window">
+          <span className="text-sm text-foreground">{accountCounts?.total ?? '-'}</span>
+        </SettingItem>
+        <SettingItem label="Active in last 7 days" description="Identities with a login in the past week">
+          <span className="text-sm text-foreground">{accountCounts?.active7d ?? '-'}</span>
+        </SettingItem>
+      </SettingsSection>
+
       <SettingsSection title="Extensions" description="Installed plugins, themes, and policy rules">
         <SettingItem label="Plugins">
           <span className="text-sm text-foreground">{pluginCount}</span>
@@ -178,7 +161,6 @@ export default function AdminDashboardPage() {
         </SettingItem>
       </SettingsSection>
 
-      {/* Recent Activity */}
       <SettingsSection title="Recent Activity" description="Latest administrative actions">
         {recentActivity.length === 0 ? (
           <div className="py-4 text-sm text-muted-foreground">

app/(main)/admin/_tabs/logs.tsx

@@ -5,7 +5,7 @@ import { RefreshCw } from 'lucide-react';
 import type { AuditEntry } from '@/lib/admin/types';
 import { apiFetch } from '@/lib/browser-navigation';
 
-export default function AdminLogsPage() {
+export function LogsTab() {
   const [entries, setEntries] = useState<AuditEntry[]>([]);
   const [total, setTotal] = useState(0);
   const [page, setPage] = useState(1);
@@ -33,8 +33,8 @@ export default function AdminLogsPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">Audit Log</h1>
           <p className="text-sm text-muted-foreground mt-1">{total} total entries</p>
         </div>
@@ -47,12 +47,11 @@ export default function AdminLogsPage() {
         </button>
       </div>
 
-      {/* Filter */}
       <div className="flex items-center gap-3">
         <select
           value={actionFilter}
           onChange={(e) => { setActionFilter(e.target.value); setPage(1); }}
-          className="h-8 rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+          className="h-8 w-full sm:w-auto rounded-md border border-input bg-background px-2.5 text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
         >
           <option value="">All actions</option>
           <option value="admin.login">Login</option>
@@ -66,15 +65,41 @@ export default function AdminLogsPage() {
         </select>
       </div>
 
-      {/* Table */}
-      <div className="border border-border rounded-lg overflow-hidden">
+      <div className="sm:hidden space-y-2">
+        {loading && entries.length === 0 ? (
+          <div className="rounded-lg border border-border px-4 py-8 text-center text-sm text-muted-foreground">Loading...</div>
+        ) : entries.length === 0 ? (
+          <div className="rounded-lg border border-border px-4 py-8 text-center text-sm text-muted-foreground">No entries found</div>
+        ) : (
+          entries.map((entry, i) => (
+            <div key={i} className="rounded-lg border border-border p-3 space-y-1.5">
+              <div className="flex items-center justify-between gap-2">
+                <span className="text-xs font-mono px-2 py-0.5 rounded bg-muted text-muted-foreground truncate">
+                  {entry.action}
+                </span>
+                <span className="text-[11px] text-muted-foreground whitespace-nowrap">
+                  {new Date(entry.ts).toLocaleString()}
+                </span>
+              </div>
+              <div className="text-xs text-foreground break-words">
+                {formatDetail(entry.detail)}
+              </div>
+              <div className="text-[11px] text-muted-foreground font-mono">
+                {entry.ip}
+              </div>
+            </div>
+          ))
+        )}
+      </div>
+
+      <div className="hidden sm:block border border-border rounded-lg overflow-x-auto">
         <table className="w-full text-sm">
           <thead>
             <tr className="border-b border-border bg-muted/30">
-              <th className="text-left px-4 py-2 font-medium text-muted-foreground">Time</th>
-              <th className="text-left px-4 py-2 font-medium text-muted-foreground">Action</th>
-              <th className="text-left px-4 py-2 font-medium text-muted-foreground">Details</th>
-              <th className="text-left px-4 py-2 font-medium text-muted-foreground">IP</th>
+              <th className="text-start px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">Time</th>
+              <th className="text-start px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">Action</th>
+              <th className="text-start px-4 py-2 font-medium text-muted-foreground">Details</th>
+              <th className="text-start px-4 py-2 font-medium text-muted-foreground whitespace-nowrap">IP</th>
             </tr>
           </thead>
           <tbody className="divide-y divide-border">
@@ -110,7 +135,6 @@ export default function AdminLogsPage() {
         </table>
       </div>
 
-      {/* Pagination */}
       {totalPages > 1 && (
         <div className="flex items-center justify-between">
           <p className="text-xs text-muted-foreground">

app/(main)/admin/_tabs/marketplace.tsx

@@ -1,8 +1,12 @@
 'use client';
 
 import { useEffect, useState, useCallback } from 'react';
-import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Filter } from 'lucide-react';
+import Link from 'next/link';
+import { Search, Download, Check, Loader2, Store, Puzzle, SwatchBook, Star, Eye, AlertTriangle, ArrowUpCircle } from 'lucide-react';
 import { apiFetch } from '@/lib/browser-navigation';
+import { compareVersions, isVersionSatisfied } from '@/lib/version-compare';
+
+const CURRENT_APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0';
 
 interface Extension {
   slug: string;
@@ -17,6 +21,9 @@ interface Extension {
   minAppVersion: string | null;
   latestVersion: string | null;
   installed: boolean;
+  installedVersion: string | null;
+  iconUrl: string | null;
+  bannerUrl: string | null;
   author: {
     displayName: string;
     githubLogin: string;
@@ -35,7 +42,7 @@ interface SearchResult {
 
 type TypeFilter = 'all' | 'plugin' | 'theme';
 
-export default function AdminMarketplacePage() {
+export function MarketplaceTab() {
   const [extensions, setExtensions] = useState<Extension[]>([]);
   const [loading, setLoading] = useState(true);
   const [query, setQuery] = useState('');
@@ -81,7 +88,6 @@ export default function AdminMarketplacePage() {
     fetchExtensions();
   }, [fetchExtensions]);
 
-  // Debounced search
   const [searchInput, setSearchInput] = useState('');
   useEffect(() => {
     const t = setTimeout(() => {
@@ -92,6 +98,15 @@ export default function AdminMarketplacePage() {
   }, [searchInput]);
 
   async function handleInstall(ext: Extension) {
+    if (ext.minAppVersion && !isVersionSatisfied(CURRENT_APP_VERSION, ext.minAppVersion)) {
+      setMessage({
+        type: 'error',
+        text: `"${ext.name}" requires app v${ext.minAppVersion}+. You are running v${CURRENT_APP_VERSION}.`,
+      });
+      return;
+    }
+    const isUpdate = ext.installed;
+    const targetVersion = ext.latestVersion || '1.0.0';
     setInstalling(ext.slug);
     setMessage(null);
 
@@ -101,7 +116,7 @@ export default function AdminMarketplacePage() {
         headers: { 'Content-Type': 'application/json' },
         body: JSON.stringify({
           slug: ext.slug,
-          version: ext.latestVersion || '1.0.0',
+          version: targetVersion,
           type: ext.type,
         }),
       });
@@ -110,14 +125,22 @@ export default function AdminMarketplacePage() {
 
       if (res.ok) {
         const warnings = data.warnings?.length ? ` (${data.warnings.length} warning(s))` : '';
-        setMessage({ type: 'success', text: `"${ext.name}" installed successfully${warnings}` });
-        // Mark as installed in the UI
-        setExtensions(prev => prev.map(e => e.slug === ext.slug ? { ...e, installed: true } : e));
+        setMessage({
+          type: 'success',
+          text: isUpdate
+            ? `"${ext.name}" updated to v${targetVersion}${warnings}`
+            : `"${ext.name}" installed successfully${warnings}`,
+        });
+        setExtensions(prev => prev.map(e =>
+          e.slug === ext.slug
+            ? { ...e, installed: true, installedVersion: targetVersion }
+            : e,
+        ));
       } else {
-        setMessage({ type: 'error', text: data.error || 'Installation failed' });
+        setMessage({ type: 'error', text: data.error || (isUpdate ? 'Update failed' : 'Installation failed') });
       }
     } catch {
-      setMessage({ type: 'error', text: 'Installation failed - network error' });
+      setMessage({ type: 'error', text: isUpdate ? 'Update failed - network error' : 'Installation failed - network error' });
     } finally {
       setInstalling(null);
     }
@@ -140,19 +163,18 @@ export default function AdminMarketplacePage() {
         </div>
       )}
 
-      {/* Search & Filters */}
-      <div className="flex items-center gap-3">
-        <div className="relative flex-1">
+      <div className="flex flex-col sm:flex-row sm:items-center gap-3">
+        <div className="relative flex-1 min-w-0">
           <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-muted-foreground" />
           <input
             type="text"
             placeholder="Search extensions..."
             value={searchInput}
             onChange={(e) => setSearchInput(e.target.value)}
-            className="w-full h-9 pl-9 pr-3 rounded-md border border-input bg-background text-sm text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring/20 focus:border-ring"
+            className="w-full h-9 ps-9 pe-3 rounded-md border border-input bg-background text-sm text-foreground placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring/20 focus:border-ring"
           />
         </div>
-        <div className="flex items-center gap-1 rounded-md border border-input bg-background p-0.5">
+        <div className="flex items-center gap-1 rounded-md border border-input bg-background p-0.5 self-start sm:self-auto">
           {(['all', 'plugin', 'theme'] as const).map((t) => (
             <button
               key={t}
@@ -169,7 +191,6 @@ export default function AdminMarketplacePage() {
         </div>
       </div>
 
-      {/* Error State */}
       {error && (
         <div className="border border-border rounded-lg p-12 text-center">
           <Store className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
@@ -186,15 +207,13 @@ export default function AdminMarketplacePage() {
         </div>
       )}
 
-      {/* Loading State */}
       {loading && !error && (
         <div className="flex items-center justify-center py-12">
           <Loader2 className="w-5 h-5 animate-spin text-muted-foreground" />
-          <span className="ml-2 text-sm text-muted-foreground">Searching extensions...</span>
+          <span className="ms-2 text-sm text-muted-foreground">Searching extensions...</span>
         </div>
       )}
 
-      {/* Empty State */}
       {!loading && !error && extensions.length === 0 && (
         <div className="border border-border rounded-lg p-12 text-center">
           <Store className="w-10 h-10 text-muted-foreground/40 mx-auto mb-3" />
@@ -207,7 +226,6 @@ export default function AdminMarketplacePage() {
         </div>
       )}
 
-      {/* Extension Grid */}
       {!loading && !error && extensions.length > 0 && (
         <>
           <div className="text-xs text-muted-foreground">
@@ -224,7 +242,6 @@ export default function AdminMarketplacePage() {
             ))}
           </div>
 
-          {/* Pagination */}
           {totalPages > 1 && (
             <div className="flex items-center justify-center gap-2 pt-2">
               <button
@@ -262,14 +279,38 @@ function ExtensionCard({
   onInstall: () => void;
 }) {
   const isPlugin = extension.type === 'plugin';
+  const previewHref = `/admin/marketplace/${encodeURIComponent(extension.slug)}`;
+  const versionMismatch = !!extension.minAppVersion
+    && !isVersionSatisfied(CURRENT_APP_VERSION, extension.minAppVersion);
+  const updateAvailable = extension.installed
+    && !!extension.installedVersion
+    && !!extension.latestVersion
+    && compareVersions(extension.latestVersion, extension.installedVersion) > 0
+    && !versionMismatch;
 
   return (
-    <div className="border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
-      <div className="p-4">
-        {/* Header */}
+    <div className="group relative border border-border rounded-lg overflow-hidden hover:border-ring/30 transition-colors">
+      {extension.bannerUrl && (
+        <Link href={previewHref} className="block focus:outline-none">
+          <img
+            src={extension.bannerUrl}
+            alt=""
+            className="block h-24 w-full object-cover border-b border-border"
+            loading="lazy"
+          />
+        </Link>
+      )}
+      <Link href={previewHref} className="block p-4 focus:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 rounded-lg">
         <div className="flex items-start gap-3">
-          <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0">
-            {isPlugin ? (
+          <div className="w-10 h-10 rounded-md bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {extension.iconUrl ? (
+              <img
+                src={extension.iconUrl}
+                alt=""
+                className="w-10 h-10 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
               <Puzzle className="w-5 h-5 text-muted-foreground" />
             ) : (
               <SwatchBook className="w-5 h-5 text-muted-foreground" />
@@ -277,7 +318,9 @@ function ExtensionCard({
           </div>
           <div className="min-w-0 flex-1">
             <div className="flex items-center gap-1.5">
-              <span className="text-sm font-medium text-foreground truncate">{extension.name}</span>
+              <span className="text-sm font-medium text-foreground truncate group-hover:underline">
+                {extension.name}
+              </span>
               {extension.featured && (
                 <Star className="w-3.5 h-3.5 text-warning shrink-0 fill-warning" />
               )}
@@ -299,12 +342,10 @@ function ExtensionCard({
           </div>
         </div>
 
-        {/* Description */}
         <p className="text-xs text-muted-foreground mt-3 line-clamp-2">
           {extension.description}
         </p>
 
-        {/* Tags */}
         {extension.tags && extension.tags.length > 0 && (
           <div className="flex flex-wrap gap-1 mt-3">
             {extension.tags.slice(0, 3).map(tag => (
@@ -315,7 +356,6 @@ function ExtensionCard({
           </div>
         )}
 
-        {/* Footer */}
         <div className="flex items-center justify-between mt-4 pt-3 border-t border-border">
           <div className="flex items-center gap-3 text-xs text-muted-foreground">
             <span className="flex items-center gap-1">
@@ -328,27 +368,58 @@ function ExtensionCard({
               </span>
             )}
           </div>
-
-          {extension.installed ? (
-            <span className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs font-medium">
-              <Check className="w-3 h-3" />
-              Installed
-            </span>
-          ) : (
-            <button
-              onClick={onInstall}
-              disabled={installing}
-              className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-primary text-primary-foreground text-xs font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
-            >
-              {installing ? (
-                <Loader2 className="w-3 h-3 animate-spin" />
-              ) : (
-                <Download className="w-3 h-3" />
-              )}
-              Install
-            </button>
-          )}
+          <span className="inline-flex items-center gap-1 text-xs text-muted-foreground group-hover:text-foreground">
+            <Eye className="w-3 h-3" />
+            Preview
+          </span>
         </div>
+      </Link>
+
+      <div className="px-4 pb-4 -mt-1 flex items-center gap-2 flex-wrap">
+        {extension.installed && updateAvailable ? (
+          <button
+            onClick={(e) => { e.preventDefault(); e.stopPropagation(); onInstall(); }}
+            disabled={installing}
+            title={`Update from v${extension.installedVersion} to v${extension.latestVersion}`}
+            className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-blue-600 text-white text-xs font-medium hover:bg-blue-700 disabled:opacity-50 transition-colors"
+          >
+            {installing ? (
+              <Loader2 className="w-3 h-3 animate-spin" />
+            ) : (
+              <ArrowUpCircle className="w-3 h-3" />
+            )}
+            Update to v{extension.latestVersion}
+          </button>
+        ) : extension.installed ? (
+          <span
+            className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 text-xs font-medium"
+            title={extension.installedVersion ? `Installed: v${extension.installedVersion}` : undefined}
+          >
+            <Check className="w-3 h-3" />
+            Installed
+          </span>
+        ) : versionMismatch ? (
+          <span
+            className="inline-flex items-center gap-1 h-7 px-2.5 rounded-md bg-amber-100 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300 text-xs font-medium"
+            title={`Requires app v${extension.minAppVersion}+. You are running v${CURRENT_APP_VERSION}.`}
+          >
+            <AlertTriangle className="w-3 h-3" />
+            Requires v{extension.minAppVersion}+
+          </span>
+        ) : (
+          <button
+            onClick={(e) => { e.preventDefault(); e.stopPropagation(); onInstall(); }}
+            disabled={installing}
+            className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-primary text-primary-foreground text-xs font-medium hover:bg-primary/90 disabled:opacity-50 transition-colors"
+          >
+            {installing ? (
+              <Loader2 className="w-3 h-3 animate-spin" />
+            ) : (
+              <Download className="w-3 h-3" />
+            )}
+            Quick install
+          </button>
+        )}
       </div>
     </div>
   );

app/(main)/admin/_tabs/plugin-config-panel.tsx

@@ -1,10 +1,10 @@
 'use client';
 
 import { useEffect, useState } from 'react';
-import { useParams } from 'next/navigation';
 import { Puzzle, ArrowLeft, Loader2, Eye, EyeOff } from 'lucide-react';
-import Link from 'next/link';
 import { apiFetch } from '@/lib/browser-navigation';
+import { usePluginSlotOffers } from '@/hooks/use-plugin-slot-offers';
+import { PluginIframeSlot } from '@/components/plugins/plugin-iframe-slot';
 
 interface ConfigField {
   type: 'string' | 'secret' | 'boolean' | 'number' | 'select';
@@ -32,9 +32,12 @@ interface PluginInfo {
   configSchema?: Record<string, ConfigField>;
 }
 
-export default function PluginConfigPage() {
-  const params = useParams();
-  const pluginId = params.id as string;
+interface Props {
+  pluginId: string;
+  onBack: () => void;
+}
+
+export function PluginConfigPanel({ pluginId, onBack }: Props) {
   const [plugin, setPlugin] = useState<PluginInfo | null>(null);
   const [config, setConfig] = useState<PluginConfig>({});
   const [formValues, setFormValues] = useState<Record<string, string>>({});
@@ -44,11 +47,32 @@ export default function PluginConfigPage() {
   const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
 
   useEffect(() => {
+    let cancelled = false;
+    async function fetchData() {
+      setLoading(true);
+      try {
+        const [pluginsRes, configRes] = await Promise.all([
+          apiFetch('/api/admin/plugins'),
+          apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`),
+        ]);
+        if (cancelled) return;
+
+        if (pluginsRes.ok) {
+          const plugins: PluginInfo[] = await pluginsRes.json();
+          setPlugin(plugins.find(p => p.id === pluginId) || null);
+        }
+
+        if (configRes.ok) {
+          setConfig(await configRes.json());
+        }
+      } finally {
+        if (!cancelled) setLoading(false);
+      }
+    }
     fetchData();
-  // eslint-disable-next-line react-hooks/exhaustive-deps
+    return () => { cancelled = true; };
   }, [pluginId]);
 
-  // Initialize form values from config + schema defaults when data loads
   useEffect(() => {
     if (!plugin?.configSchema) return;
     const initial: Record<string, string> = {};
@@ -65,33 +89,11 @@ export default function PluginConfigPage() {
     setFormValues(initial);
   }, [plugin, config]);
 
-  async function fetchData() {
-    setLoading(true);
-    try {
-      const [pluginsRes, configRes] = await Promise.all([
-        apiFetch('/api/admin/plugins'),
-        apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`),
-      ]);
-
-      if (pluginsRes.ok) {
-        const plugins: PluginInfo[] = await pluginsRes.json();
-        setPlugin(plugins.find(p => p.id === pluginId) || null);
-      }
-
-      if (configRes.ok) {
-        setConfig(await configRes.json());
-      }
-    } finally {
-      setLoading(false);
-    }
-  }
-
   async function handleSaveAll() {
     if (!plugin?.configSchema) return;
     setSaving(true);
     setMessage(null);
 
-    // Validate required fields
     for (const [key, field] of Object.entries(plugin.configSchema)) {
       if (field.required && !formValues[key]?.trim()) {
         setMessage({ type: 'error', text: `"${field.label}" is required` });
@@ -101,22 +103,18 @@ export default function PluginConfigPage() {
     }
 
     try {
-      // Save each changed field
       let hasError = false;
       for (const [key, field] of Object.entries(plugin.configSchema)) {
         const newVal = formValues[key] ?? '';
         const oldVal = config[key] !== undefined ? String(config[key]) : '';
 
-        // Skip unchanged fields (and skip secret fields that show as empty when they have a stored value)
         if (newVal === oldVal) continue;
         if (field.type === 'secret' && !newVal && config[key]) continue;
 
-        // Convert types
         let value: unknown = newVal;
         if (field.type === 'boolean') value = newVal === 'true';
         else if (field.type === 'number') value = Number(newVal);
 
-        // Delete if clearing a non-required field
         if (!newVal && !field.required) {
           const res = await apiFetch(`/api/admin/plugins/${encodeURIComponent(pluginId)}/config`, {
             method: 'DELETE',
@@ -157,7 +155,7 @@ export default function PluginConfigPage() {
   if (loading) {
     return (
       <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">
-        <Loader2 className="w-4 h-4 animate-spin mr-2" />
+        <Loader2 className="w-4 h-4 animate-spin me-2" />
         Loading...
       </div>
     );
@@ -166,9 +164,13 @@ export default function PluginConfigPage() {
   if (!plugin) {
     return (
       <div className="space-y-4">
-        <Link href="/admin/plugins" className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground">
+        <button
+          type="button"
+          onClick={onBack}
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+        >
           <ArrowLeft className="w-4 h-4" /> Back to Plugins
-        </Link>
+        </button>
         <p className="text-sm text-destructive">Plugin not found: {pluginId}</p>
       </div>
     );
@@ -180,9 +182,14 @@ export default function PluginConfigPage() {
   return (
     <div className="space-y-6">
       <div className="flex items-center gap-3">
-        <Link href="/admin/plugins" className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground">
+        <button
+          type="button"
+          onClick={onBack}
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+          aria-label="Back to Plugins"
+        >
           <ArrowLeft className="w-4 h-4" />
-        </Link>
+        </button>
         <div>
           <h1 className="text-2xl font-semibold text-foreground flex items-center gap-2">
             <Puzzle className="w-5 h-5" />
@@ -210,7 +217,7 @@ export default function PluginConfigPage() {
               <div key={key}>
                 <label className="text-sm font-medium text-foreground block mb-1">
                   {field.label}
-                  {field.required && <span className="text-destructive ml-0.5">*</span>}
+                  {field.required && <span className="text-destructive ms-0.5">*</span>}
                 </label>
                 {field.description && (
                   <p className="text-xs text-muted-foreground mb-1.5">{field.description}</p>
@@ -243,7 +250,7 @@ export default function PluginConfigPage() {
                       value={formValues[key] ?? ''}
                       onChange={(e) => setFormValues(prev => ({ ...prev, [key]: e.target.value }))}
                       placeholder={config[key] ? '••••••••  (unchanged)' : (field.placeholder || '')}
-                      className="w-full h-9 px-3 pr-10 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring font-mono"
+                      className="w-full h-9 px-3 pe-10 rounded-md border border-input bg-background text-sm focus:outline-none focus:ring-2 focus:ring-ring font-mono"
                     />
                     <button
                       type="button"
@@ -281,6 +288,27 @@ export default function PluginConfigPage() {
           <p className="text-sm text-muted-foreground">This plugin does not declare any configuration settings.</p>
         </div>
       )}
+
+      <PluginAdminSection pluginId={pluginId} />
+    </div>
+  );
+}
+
+/**
+ * Renders the plugin's own `admin-plugin-page` slot, if the plugin offers
+ * one. Sandboxed plugins ship a React component under `slots['admin-plugin-page']`
+ * and the host gives it a dedicated iframe inside the admin panel.
+ */
+function PluginAdminSection({ pluginId }: { pluginId: string }) {
+  const offers = usePluginSlotOffers('admin-plugin-page');
+  const offer = offers.find((o) => o.pluginId === pluginId);
+  if (!offer) return null;
+  return (
+    <div className="border border-border rounded-lg overflow-hidden">
+      <div className="bg-muted/40 px-4 py-2 text-xs font-medium text-muted-foreground uppercase tracking-wider">
+        Plugin admin panel
+      </div>
+      <PluginIframeSlot pluginId={pluginId} slot="admin-plugin-page" />
     </div>
   );
 }

app/(main)/admin/_tabs/plugins.tsx

@@ -1,11 +1,11 @@
 'use client';
 
 import { useEffect, useState, useRef } from 'react';
-import Link from 'next/link';
 import { Upload, Trash2, Power, PowerOff, AlertTriangle, Loader2, Package, Save, Shield, Lock, LockOpen, Settings } from 'lucide-react';
 import type { SettingsPolicy } from '@/lib/admin/types';
 import { DEFAULT_POLICY } from '@/lib/admin/types';
 import { apiFetch } from '@/lib/browser-navigation';
+import { PluginConfigPanel } from './plugin-config-panel';
 
 interface PluginEntry {
   id: string;
@@ -21,15 +21,20 @@ interface PluginEntry {
   updatedAt: string;
 }
 
-export default function AdminPluginsPage() {
+export function PluginsTab() {
   const [plugins, setPlugins] = useState<PluginEntry[]>([]);
   const [loading, setLoading] = useState(true);
   const [uploading, setUploading] = useState(false);
   const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  // Bundle held back by the pattern scanner, awaiting an explicit admin decision.
+  const [pendingScan, setPendingScan] = useState<
+    { file: File; findings: Array<{ file: string; patterns: string[] }> } | null
+  >(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const [policy, setPolicy] = useState<SettingsPolicy>({ ...DEFAULT_POLICY });
   const [policyDirty, setPolicyDirty] = useState(false);
   const [savingPolicy, setSavingPolicy] = useState(false);
+  const [configuringId, setConfiguringId] = useState<string | null>(null);
 
   useEffect(() => { fetchPlugins(); fetchPolicy(); }, []);
 
@@ -103,15 +108,17 @@ export default function AdminPluginsPage() {
     }
   }
 
-  async function handleUpload(e: React.ChangeEvent<HTMLInputElement>) {
-    const file = e.target.files?.[0];
-    if (!file) return;
-
+  // Upload a bundle. The scanner may refuse it for containing patterns that are
+  // expected in a vendored crypto library (openpgp.js, pkijs); in that case the
+  // server returns `canOverride` and we hold the file so the admin can review
+  // the findings and decide. `override` re-posts the same file with consent.
+  async function uploadPlugin(file: File, override: boolean) {
     setUploading(true);
     setMessage(null);
 
     const formData = new FormData();
     formData.append('file', file);
+    if (override) formData.append('overrideWarnings', 'true');
 
     try {
       const res = await apiFetch('/api/admin/plugins', {
@@ -121,13 +128,22 @@ export default function AdminPluginsPage() {
 
       const data = await res.json();
       if (res.ok) {
-        const warnings = data.warnings?.length ? ` (${data.warnings.length} warning(s))` : '';
-        setMessage({ type: 'success', text: `Plugin "${data.plugin.name}" installed${warnings}` });
+        setPendingScan(null);
+        const accepted = data.findings?.length
+          ? ` — ${data.findings.length} scanner finding(s) accepted and logged`
+          : '';
+        setMessage({ type: 'success', text: `Plugin "${data.plugin.name}" installed${accepted}` });
         await fetchPlugins();
+      } else if (data.canOverride && Array.isArray(data.findings) && !override) {
+        // Hold the file rather than the error: the admin needs to see WHAT
+        // tripped, in WHICH file, before deciding.
+        setPendingScan({ file, findings: data.findings });
       } else {
+        setPendingScan(null);
         setMessage({ type: 'error', text: data.error || 'Upload failed' });
       }
     } catch {
+      setPendingScan(null);
       setMessage({ type: 'error', text: 'Upload failed' });
     } finally {
       setUploading(false);
@@ -135,6 +151,13 @@ export default function AdminPluginsPage() {
     }
   }
 
+  async function handleUpload(e: React.ChangeEvent<HTMLInputElement>) {
+    const file = e.target.files?.[0];
+    if (!file) return;
+    setPendingScan(null);
+    await uploadPlugin(file, false);
+  }
+
   async function togglePlugin(id: string, enabled: boolean) {
     setMessage(null);
     const res = await apiFetch('/api/admin/plugins', {
@@ -153,7 +176,6 @@ export default function AdminPluginsPage() {
 
   async function toggleForceEnabled(id: string, forceEnabled: boolean) {
     setMessage(null);
-    // If force-enabling, also ensure the plugin is enabled
     const body: Record<string, unknown> = { id, forceEnabled };
     if (forceEnabled) body.enabled = true;
 
@@ -165,7 +187,6 @@ export default function AdminPluginsPage() {
 
     if (res.ok) {
       setPlugins(prev => prev.map(p => p.id === id ? { ...p, forceEnabled, ...(forceEnabled ? { enabled: true } : {}) } : p));
-      // Also update policy
       setPolicy(prev => {
         const current = prev.forceEnabledPlugins || [];
         return {
@@ -252,6 +273,10 @@ export default function AdminPluginsPage() {
     }
   }
 
+  if (configuringId) {
+    return <PluginConfigPanel pluginId={configuringId} onBack={() => { setConfiguringId(null); fetchPlugins(); }} />;
+  }
+
   if (loading) {
     return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
   }
@@ -262,12 +287,12 @@ export default function AdminPluginsPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">Plugins</h1>
           <p className="text-sm text-muted-foreground mt-1">Manage plugins and plugin policy for all users</p>
         </div>
-        <div className="flex items-center gap-2">
+        <div className="flex flex-wrap items-center gap-2">
           {policyDirty && (
             <button
               onClick={handleSavePolicy}
@@ -299,7 +324,51 @@ export default function AdminPluginsPage() {
         </div>
       )}
 
-      {/* Plugin Policy */}
+      {pendingScan && (
+        <div className="border border-warning/40 bg-warning/5 rounded-lg p-4 space-y-3">
+          <div className="flex items-start gap-2">
+            <AlertTriangle className="w-4 h-4 text-warning mt-0.5 flex-shrink-0" />
+            <div className="space-y-1">
+              <p className="text-sm font-medium text-foreground">
+                Scanner flagged <span className="font-mono">{pendingScan.file.name}</span>
+              </p>
+              <p className="text-xs text-muted-foreground">
+                These patterns can indicate malicious code, but they also appear in legitimate
+                minified crypto libraries such as openpgp.js and pkijs. Review the findings before
+                proceeding — installing anyway is recorded in the audit log.
+              </p>
+            </div>
+          </div>
+
+          <ul className="space-y-1">
+            {pendingScan.findings.map(f => (
+              <li key={f.file} className="text-xs font-mono bg-background/60 border border-border rounded px-2 py-1">
+                <span className="text-foreground">{f.file}</span>
+                <span className="text-muted-foreground"> — {f.patterns.join(', ')}</span>
+              </li>
+            ))}
+          </ul>
+
+          <div className="flex items-center gap-2">
+            <button
+              onClick={() => uploadPlugin(pendingScan.file, true)}
+              disabled={uploading}
+              className="inline-flex items-center gap-2 h-8 px-3 rounded-md bg-destructive text-destructive-foreground text-xs font-medium hover:bg-destructive/90 disabled:opacity-50 transition-all"
+            >
+              {uploading ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <AlertTriangle className="w-3.5 h-3.5" />}
+              Install anyway
+            </button>
+            <button
+              onClick={() => { setPendingScan(null); setMessage(null); }}
+              disabled={uploading}
+              className="inline-flex items-center h-8 px-3 rounded-md border border-border text-xs font-medium text-foreground hover:bg-muted disabled:opacity-50 transition-all"
+            >
+              Cancel
+            </button>
+          </div>
+        </div>
+      )}
+
       <div className="border border-border rounded-lg">
         <div className="px-4 py-3 border-b border-border bg-muted/30">
           <div className="flex items-center gap-2">
@@ -309,7 +378,7 @@ export default function AdminPluginsPage() {
           <p className="text-xs text-muted-foreground mt-0.5">Control plugin availability for users</p>
         </div>
         <div className="divide-y divide-border">
-          <div className="px-4 py-3 flex items-center justify-between gap-4">
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
             <div>
               <span className="text-sm text-foreground">Plugins Enabled</span>
               <p className="text-xs text-muted-foreground mt-0.5">Allow the plugin system to load and run plugins for users</p>
@@ -320,7 +389,7 @@ export default function AdminPluginsPage() {
             </button>
           </div>
 
-          <div className="px-4 py-3 flex items-center justify-between gap-4">
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
             <div>
               <span className="text-sm text-foreground">User Plugin Uploads</span>
               <p className="text-xs text-muted-foreground mt-0.5">Allow users to upload plugin ZIP files in Settings</p>
@@ -331,7 +400,7 @@ export default function AdminPluginsPage() {
             </button>
           </div>
 
-          <div className="px-4 py-3 flex items-center justify-between gap-4">
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
             <div>
               <span className="text-sm text-foreground">Require Admin Approval</span>
               <p className="text-xs text-muted-foreground mt-0.5">User-uploaded plugins must be approved by an admin before they can be enabled</p>
@@ -342,9 +411,8 @@ export default function AdminPluginsPage() {
             </button>
           </div>
 
-          {/* Force enable / disable all */}
           {plugins.length > 0 && (
-            <div className="px-4 py-3 flex items-center justify-between gap-4">
+            <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
               <div>
                 <span className="text-sm text-foreground">Force Enable / Disable All</span>
                 <p className="text-xs text-muted-foreground mt-0.5">Bulk toggle all deployed plugins at once</p>
@@ -370,7 +438,6 @@ export default function AdminPluginsPage() {
         </div>
       </div>
 
-      {/* Deployed Plugins */}
       <div className="border border-border rounded-lg">
         <div className="px-4 py-3 border-b border-border bg-muted/30">
           <div className="flex items-center gap-2">
@@ -388,9 +455,9 @@ export default function AdminPluginsPage() {
         ) : (
           <div className="divide-y divide-border">
             {plugins.map(plugin => (
-              <div key={plugin.id} className="px-4 py-4 flex items-center justify-between gap-4">
+              <div key={plugin.id} className="px-4 py-4 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
                 <div className="min-w-0 flex-1">
-                  <div className="flex items-center gap-2">
+                  <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
                     <span className="text-sm font-medium text-foreground">{plugin.name}</span>
                     <span className="text-xs text-muted-foreground">v{plugin.version}</span>
                     <span className={`text-xs px-1.5 py-0.5 rounded ${plugin.enabled ? 'bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400' : 'bg-muted text-muted-foreground'}`}>
@@ -419,13 +486,14 @@ export default function AdminPluginsPage() {
               </div>
 
               <div className="flex items-center gap-2">
-                <Link
-                  href={`/admin/plugins/${plugin.id}`}
+                <button
+                  type="button"
+                  onClick={() => setConfiguringId(plugin.id)}
                   title="Configure"
                   className="p-2 rounded-md hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
                 >
                   <Settings className="w-4 h-4" />
-                </Link>
+                </button>
                 <button
                   onClick={() => toggleForceEnabled(plugin.id, !plugin.forceEnabled)}
                   title={plugin.forceEnabled ? 'Remove force-enable (users can disable)' : 'Force enable (users cannot disable)'}

app/(main)/admin/_tabs/policy.tsx

@@ -6,21 +6,28 @@ import type { SettingsPolicy, FeatureGates } from '@/lib/admin/types';
 import { DEFAULT_FEATURE_GATES, DEFAULT_POLICY } from '@/lib/admin/types';
 import { apiFetch } from '@/lib/browser-navigation';
 
-// Feature gates managed on their own admin pages (excluded from this list)
-const EXCLUDED_FEATURE_GATES: (keyof FeatureGates)[] = ['pluginsEnabled', 'pluginsUploadEnabled', 'themesEnabled', 'userThemesEnabled'];
+// `allMailViewEnabled` is deprecated (folded into `crossAllViewEnabled`, normalized
+// forward on policy load), so it is hidden from the admin UI.
+const EXCLUDED_FEATURE_GATES: (keyof FeatureGates)[] = ['pluginsEnabled', 'pluginsUploadEnabled', 'themesEnabled', 'userThemesEnabled', 'allMailViewEnabled'];
 
 const FEATURE_GATE_LABELS: Partial<Record<keyof FeatureGates, { label: string; description: string }>> = {
   sidebarAppsEnabled: { label: 'Sidebar Apps', description: 'Allow custom web apps in navigation rail' },
   settingsExportEnabled: { label: 'Settings Export/Import', description: 'Allow users to export and import settings JSON' },
   customKeywordsEnabled: { label: 'Custom Keywords', description: 'Allow user-created labels and tags' },
   templatesEnabled: { label: 'Email Templates', description: 'Allow email template creation and library' },
+  calendarEnabled: { label: 'Calendar', description: 'Enable calendar features and views' },
   calendarTasksEnabled: { label: 'Calendar Tasks', description: 'Show task panel in calendar view' },
+  contactsEnabled: { label: 'Contacts', description: 'Enable contacts/address book features' },
   smimeEnabled: { label: 'S/MIME', description: 'Enable certificate management and email signing' },
   externalContentEnabled: { label: 'External Content', description: 'Allow users to choose external content loading policy' },
   debugModeEnabled: { label: 'Debug Mode', description: 'Allow users to enable debug/diagnostic mode' },
   folderIconsEnabled: { label: 'Folder Icons', description: 'Allow custom folder icon picker' },
   hoverActionsConfigEnabled: { label: 'Hover Actions Config', description: 'Allow users to customize email hover actions' },
   filesEnabled: { label: 'Files (WebDAV)', description: 'Enable file storage via WebDAV. WARNING: Large uploads can cause Stalwart/RocksDB instability. Not recommended for production.' },
+  crossUnreadViewEnabled: { label: 'Unified Mailbox: Unread', description: 'Allow an "Unread" entry in the Unified Mailbox section that lists unread mail across the account and its shared folders (or every account when the cross-account sub-option is on). Honors the user\'s folder selection. Requires the matching per-user toggle in Settings → Appearance.' },
+  crossStarredViewEnabled: { label: 'Unified Mailbox: Starred', description: 'Allow a "Starred" entry in the Unified Mailbox section that lists flagged/starred mail across the account and its shared folders (or every account when the cross-account sub-option is on). Honors the user\'s folder selection. Requires the matching per-user toggle in Settings → Appearance.' },
+  crossAllViewEnabled: { label: 'Unified Mailbox: All Mail', description: 'Allow an "All mail" entry in the Unified Mailbox section that lists all mail across the account and its shared folders (or every account when the cross-account sub-option is on). Honors the user\'s folder selection. Requires the matching per-user toggle in Settings → Appearance.' },
+  unifiedCrossAccountEnabled: { label: 'Unified Mailbox: Cross-account', description: 'Allow users to expand the Unified Mailbox beyond the active account boundary so its lists merge across every logged-in account. When off, the Unified Mailbox stays within the active account and its shared folders.' },
 };
 
 const RESTRICTABLE_SETTINGS = [
@@ -28,9 +35,9 @@ const RESTRICTABLE_SETTINGS = [
   { key: 'density', label: 'Density', category: 'Appearance', type: 'enum', allowedValues: ['compact', 'regular', 'spacious'] },
   { key: 'animationsEnabled', label: 'Animations', category: 'Appearance', type: 'boolean' },
   { key: 'markAsReadDelay', label: 'Mark as Read Delay', category: 'Email', type: 'number' },
-  { key: 'deleteAction', label: 'Delete Action', category: 'Email', type: 'enum', allowedValues: ['trash', 'permanent'] },
+  { key: 'deleteAction', label: 'Delete Action', category: 'Email', type: 'enum', allowedValues: ['trash', 'trash-and-read', 'permanent'] },
   { key: 'showPreview', label: 'Show Preview', category: 'Email', type: 'boolean' },
-  { key: 'mailLayout', label: 'Mail Layout', category: 'Email', type: 'enum', allowedValues: ['split', 'focus'] },
+  { key: 'mailLayout', label: 'Mail Layout', category: 'Email', type: 'enum', allowedValues: ['split', 'focus', 'horizontal'] },
   { key: 'emailsPerPage', label: 'Emails Per Page', category: 'Email', type: 'number' },
   { key: 'externalContentPolicy', label: 'External Content Policy', category: 'Email', type: 'enum', allowedValues: ['allow', 'block', 'ask'] },
   { key: 'sendConfirmation', label: 'Send Confirmation', category: 'Composer', type: 'boolean' },
@@ -43,7 +50,7 @@ const RESTRICTABLE_SETTINGS = [
   { key: 'debugMode', label: 'Debug Mode', category: 'Advanced', type: 'boolean' },
 ];
 
-export default function AdminPolicyPage() {
+export function PolicyTab() {
   const [policy, setPolicy] = useState<SettingsPolicy>({ ...DEFAULT_POLICY });
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
@@ -74,6 +81,18 @@ export default function AdminPolicyPage() {
     setMessage(null);
   }
 
+  function setPushRelayUrl(value: string) {
+    setPolicy(prev => ({ ...prev, pushRelayUrl: value }));
+    setDirty(true);
+    setMessage(null);
+  }
+
+  function togglePushRelayLocked() {
+    setPolicy(prev => ({ ...prev, pushRelayUrlLocked: !prev.pushRelayUrlLocked }));
+    setDirty(true);
+    setMessage(null);
+  }
+
   function toggleLocked(settingKey: string) {
     setPolicy(prev => {
       const existing = prev.restrictions[settingKey] || {};
@@ -131,8 +150,8 @@ export default function AdminPolicyPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">User Policy</h1>
           <p className="text-sm text-muted-foreground mt-1">Control which features and settings users can access</p>
         </div>
@@ -154,7 +173,6 @@ export default function AdminPolicyPage() {
         </div>
       )}
 
-      {/* Feature Gates */}
       <div className="border border-border rounded-lg">
         <div className="px-4 py-3 border-b border-border bg-muted/30">
           <h2 className="text-sm font-medium text-foreground">Feature Gates</h2>
@@ -169,13 +187,13 @@ export default function AdminPolicyPage() {
             const { label, description } = meta;
             const enabled = policy.features[key];
             return (
-              <div key={key} className="px-4 py-3 flex items-center justify-between gap-4">
-                <div>
+              <div key={key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+                <div className="min-w-0">
                   <span className="text-sm text-foreground">{label}</span>
                   <p className="text-xs text-muted-foreground mt-0.5">{description}</p>
                 </div>
                 <button onClick={() => toggleFeature(key)}
-                  className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${enabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+                  className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${enabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
                   <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${enabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
                 </button>
               </div>
@@ -184,7 +202,34 @@ export default function AdminPolicyPage() {
         </div>
       </div>
 
-      {/* Setting Restrictions */}
+      <div className="border border-border rounded-lg">
+        <div className="px-4 py-3 border-b border-border bg-muted/30">
+          <h2 className="text-sm font-medium text-foreground">Push Relay</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Override the Web Push relay URL shown in user notification settings. Leave empty to use the built-in default.</p>
+        </div>
+        <div className="px-4 py-3 space-y-3">
+          <input
+            type="url"
+            inputMode="url"
+            autoComplete="off"
+            spellCheck={false}
+            value={policy.pushRelayUrl ?? ''}
+            onChange={(e) => setPushRelayUrl(e.target.value)}
+            placeholder="https://notifications.relay.example.com"
+            className="w-full rounded border border-input bg-background px-3 py-2 text-sm"
+          />
+          <label className="flex items-center gap-1.5 text-xs text-muted-foreground cursor-pointer">
+            <input
+              type="checkbox"
+              checked={!!policy.pushRelayUrlLocked}
+              onChange={togglePushRelayLocked}
+              className="rounded border-input"
+            />
+            <Lock className="w-3 h-3" /> Lock - users cannot change this URL
+          </label>
+        </div>
+      </div>
+
       {categories.map(category => (
         <div key={category} className="border border-border rounded-lg">
           <div className="px-4 py-3 border-b border-border bg-muted/30">
@@ -194,9 +239,9 @@ export default function AdminPolicyPage() {
             {RESTRICTABLE_SETTINGS.filter(s => s.category === category).map(setting => {
               const restriction = policy.restrictions[setting.key] || {};
               return (
-                <div key={setting.key} className="px-4 py-3 flex items-center justify-between gap-4">
+                <div key={setting.key} className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
                   <span className="text-sm text-foreground">{setting.label}</span>
-                  <div className="flex items-center gap-3">
+                  <div className="flex items-center gap-3 shrink-0">
                     <label className="flex items-center gap-1.5 text-xs text-muted-foreground cursor-pointer">
                       <input type="checkbox" checked={!!restriction.locked} onChange={() => toggleLocked(setting.key)}
                         className="rounded border-input" />

app/(main)/admin/_tabs/settings.tsx

@@ -3,13 +3,16 @@
 import { useEffect, useState } from 'react';
 import { Save, RotateCcw, Loader2 } from 'lucide-react';
 import { apiFetch } from '@/lib/browser-navigation';
+import { JmapServersSection } from './_jmap-servers-section';
+import type { JmapServerEntry } from '@/lib/admin/jmap-servers';
 
 interface ConfigEntry {
-  value: unknown;
+  value?: unknown;
   source: 'admin' | 'env' | 'default';
+  hasValue?: boolean;
 }
 
-export default function AdminSettingsPage() {
+export function SettingsTab() {
   const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
   const [edits, setEdits] = useState<Record<string, unknown>>({});
   const [loading, setLoading] = useState(true);
@@ -86,8 +89,8 @@ export default function AdminSettingsPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">Server Settings</h1>
           <p className="text-sm text-muted-foreground mt-1">General server configuration</p>
         </div>
@@ -109,13 +112,12 @@ export default function AdminSettingsPage() {
         </div>
       )}
 
-      {/* General */}
       <SettingsSection title="General">
         <TextSetting label="Application Name" configKey="appName" value={currentValue('appName') as string} source={config.appName?.source} onChange={handleChange} onRevert={handleRevert} />
         <TextSetting label="JMAP Server URL" configKey="jmapServerUrl" value={currentValue('jmapServerUrl') as string} source={config.jmapServerUrl?.source} onChange={handleChange} onRevert={handleRevert} placeholder="https://mail.example.com" />
         <ToggleSetting label="Allow Custom JMAP Endpoint" description="Show a JMAP server URL field on the login form, allowing users to connect to any JMAP server" configKey="allowCustomJmapEndpoint" value={currentValue('allowCustomJmapEndpoint') as boolean} source={config.allowCustomJmapEndpoint?.source} onChange={handleChange} onRevert={handleRevert} />
         {!!currentValue('allowCustomJmapEndpoint') && (
-          <div className="px-4 py-2.5 bg-amber-50 dark:bg-amber-950/30 border-l-2 border-amber-400 dark:border-amber-600">
+          <div className="px-4 py-2.5 bg-amber-50 dark:bg-amber-950/30 border-s-2 border-amber-400 dark:border-amber-600">
             <p className="text-xs text-amber-800 dark:text-amber-300 leading-relaxed">
               <strong>CORS warning:</strong> External JMAP servers must include this domain in their CORS <code className="text-[11px] bg-amber-100 dark:bg-amber-900/50 px-1 py-0.5 rounded">Access-Control-Allow-Origin</code> header, or requests from the browser will be blocked.
             </p>
@@ -123,15 +125,39 @@ export default function AdminSettingsPage() {
         )}
         <ToggleSetting label="Stalwart Features" description="Enable Stalwart Mail Server-specific features" configKey="stalwartFeaturesEnabled" value={currentValue('stalwartFeaturesEnabled') as boolean} source={config.stalwartFeaturesEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
         <ToggleSetting label="Demo Mode" description="Enable demo mode with sample data" configKey="demoMode" value={currentValue('demoMode') as boolean} source={config.demoMode?.source} onChange={handleChange} onRevert={handleRevert} />
+        <ToggleSetting label="Search Engine Indexing" description="Allow search engines to index this webmail. Off (the default) sends noindex/nofollow in the page head, recommended for private deployments." configKey="searchEngineIndexing" value={currentValue('searchEngineIndexing') as boolean} source={config.searchEngineIndexing?.source} onChange={handleChange} onRevert={handleRevert} />
+      </SettingsSection>
+
+      <SettingsSection title="JMAP Servers (multi-server)">
+        <ToggleSetting
+          label="Auto-pick server by email domain"
+          description="When users type their email, automatically select the matching server from the list below."
+          configKey="jmapServerAutoPickByDomain"
+          value={currentValue('jmapServerAutoPickByDomain') as boolean}
+          source={config.jmapServerAutoPickByDomain?.source}
+          onChange={handleChange}
+          onRevert={handleRevert}
+        />
+        <JmapServersSection
+          value={(currentValue('jmapServers') as JmapServerEntry[]) ?? []}
+          source={config.jmapServers?.source}
+          onChange={(next) => handleChange('jmapServers', next)}
+          onRevert={() => handleRevert('jmapServers')}
+        />
+        {Array.isArray(currentValue('jmapServers')) && (currentValue('jmapServers') as JmapServerEntry[]).length > 0 && (
+          <div className="px-4 py-2.5 bg-amber-50 dark:bg-amber-950/30 border-s-2 border-amber-400 dark:border-amber-600">
+            <p className="text-xs text-amber-800 dark:text-amber-300 leading-relaxed">
+              <strong>CORS warning:</strong> Each JMAP server must allow this webmail's origin in its <code className="text-[11px] bg-amber-100 dark:bg-amber-900/50 px-1 py-0.5 rounded">Access-Control-Allow-Origin</code> header, or browser requests will be blocked.
+            </p>
+          </div>
+        )}
       </SettingsSection>
 
-      {/* Logging */}
       <SettingsSection title="Logging">
         <SelectSetting label="Log Format" configKey="logFormat" value={currentValue('logFormat') as string} source={config.logFormat?.source} options={['text', 'json']} onChange={handleChange} onRevert={handleRevert} />
         <SelectSetting label="Log Level" configKey="logLevel" value={currentValue('logLevel') as string} source={config.logLevel?.source} options={['error', 'warn', 'info', 'debug']} onChange={handleChange} onRevert={handleRevert} />
       </SettingsSection>
 
-      {/* Settings Sync */}
       <SettingsSection title="Settings Sync">
         <ToggleSetting label="Settings Sync Enabled" description="Requires SESSION_SECRET to be set" configKey="settingsSyncEnabled" value={currentValue('settingsSyncEnabled') as boolean} source={config.settingsSyncEnabled?.source} onChange={handleChange} onRevert={handleRevert} />
       </SettingsSection>
@@ -166,21 +192,21 @@ function TextSetting({ label, configKey, value, source, onChange, onRevert, plac
   onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void; placeholder?: string;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
       <div className="flex items-center gap-2 min-w-0">
-        <label className="text-sm text-foreground whitespace-nowrap">{label}</label>
+        <label className="text-sm text-foreground">{label}</label>
         <SourceBadge source={source} />
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 w-full sm:w-auto">
         <input
           type="text"
           value={value ?? ''}
           onChange={(e) => onChange(configKey, e.target.value)}
           placeholder={placeholder}
-          className="h-8 w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+          className="h-8 w-full sm:w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
         />
         {source === 'admin' && (
-          <button onClick={() => onRevert(configKey)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
+          <button onClick={() => onRevert(configKey)} className="shrink-0 text-muted-foreground hover:text-foreground" title="Revert to default">
             <RotateCcw className="w-3.5 h-3.5" />
           </button>
         )}
@@ -194,7 +220,7 @@ function ToggleSetting({ label, description, configKey, value, source, onChange,
   onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
       <div className="min-w-0">
         <div className="flex items-center gap-2">
           <span className="text-sm text-foreground">{label}</span>
@@ -202,7 +228,7 @@ function ToggleSetting({ label, description, configKey, value, source, onChange,
         </div>
         {description && <p className="text-xs text-muted-foreground mt-0.5">{description}</p>}
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 shrink-0">
         <button
           onClick={() => onChange(configKey, !value)}
           className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${value ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}
@@ -224,12 +250,12 @@ function SelectSetting({ label, configKey, value, source, options, onChange, onR
   onChange: (key: string, value: unknown) => void; onRevert: (key: string) => void;
 }) {
   return (
-    <div className="px-4 py-3 flex items-center justify-between gap-4">
-      <div className="flex items-center gap-2">
+    <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+      <div className="flex items-center gap-2 min-w-0">
         <span className="text-sm text-foreground">{label}</span>
         <SourceBadge source={source} />
       </div>
-      <div className="flex items-center gap-2">
+      <div className="flex items-center gap-2 shrink-0">
         <select
           value={value ?? ''}
           onChange={(e) => onChange(configKey, e.target.value)}

app/(main)/admin/_tabs/telemetry.tsx

@@ -0,0 +1,251 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { Loader2, Send, Save, CheckCircle2, XCircle, ExternalLink } from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+
+interface TelemetryStatus {
+  consent: 'pending' | 'on' | 'off';
+  consentSource: 'env' | 'file';
+  endpoint: string;
+  defaultEndpoint: string;
+  consentedAt: string | null;
+  lastSentAt: string | null;
+  nextScheduledAt: string | null;
+  payloadPreview: Record<string, unknown>;
+  accountCounts: { total: number; active7d: number };
+}
+
+function timeAgo(iso: string | null): string {
+  if (!iso) return 'never';
+  const d = Date.now() - new Date(iso).getTime();
+  if (d < 0) return new Date(iso).toLocaleString();
+  const m = Math.floor(d / 60000);
+  if (m < 1) return 'just now';
+  if (m < 60) return `${m} min ago`;
+  const h = Math.floor(m / 60);
+  if (h < 48) return `${h} hours ago`;
+  const days = Math.floor(h / 24);
+  return `${days} days ago`;
+}
+
+export function TelemetryTab() {
+  const [status, setStatus] = useState<TelemetryStatus | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [busy, setBusy] = useState<string | null>(null);
+  const [endpointDraft, setEndpointDraft] = useState('');
+  const [sendResult, setSendResult] = useState<{ ok: boolean; msg: string } | null>(null);
+
+  async function refresh(): Promise<void> {
+    setLoading(true);
+    try {
+      const r = await apiFetch('/api/admin/telemetry');
+      if (!r.ok) throw new Error('failed to load');
+      const data = (await r.json()) as TelemetryStatus;
+      setStatus(data);
+      setEndpointDraft(data.endpoint);
+    } catch (err) {
+      console.error(err);
+    } finally {
+      setLoading(false);
+    }
+  }
+  useEffect(() => { void refresh(); }, []);
+
+  async function setConsent(consent: 'on' | 'off'): Promise<void> {
+    setBusy('consent');
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'set-consent', consent }),
+      });
+      if (!r.ok) {
+        const j = (await r.json().catch(() => ({}))) as { error?: string };
+        alert(j.error ?? 'failed');
+      }
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  async function saveEndpoint(): Promise<void> {
+    setBusy('endpoint');
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'set-endpoint', endpoint: endpointDraft }),
+      });
+      if (!r.ok) {
+        const j = (await r.json().catch(() => ({}))) as { error?: string };
+        alert(j.error ?? 'failed');
+      }
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  async function sendNow(): Promise<void> {
+    setBusy('send');
+    setSendResult(null);
+    try {
+      const r = await apiFetch('/api/admin/telemetry', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'send-now' }),
+      });
+      const j = (await r.json().catch(() => ({}))) as { ok?: boolean; status?: number; error?: string };
+      setSendResult({
+        ok: !!j.ok,
+        msg: j.ok ? `sent (HTTP ${j.status ?? '?'})` : `failed: ${j.error ?? 'unknown'}`,
+      });
+      await refresh();
+    } finally { setBusy(null); }
+  }
+
+  if (loading || !status) {
+    return (
+      <div className="p-8 flex items-center gap-2 text-muted-foreground">
+        <Loader2 className="h-4 w-4 animate-spin" /> loading…
+      </div>
+    );
+  }
+
+  const envOverridden = status.consentSource === 'env';
+  const isOn = status.consent === 'on';
+
+  return (
+    <div className="space-y-6">
+      <header className="space-y-2">
+        <h1 className="text-2xl font-semibold">Anonymous Usage Stats</h1>
+        <p className="text-sm text-muted-foreground">
+          Bulwark can send one anonymous heartbeat per day so we can see how many instances are
+          running, on what platforms, and which features they use. It&apos;s <strong>off by
+          default</strong>; one click below enables it and helps us make the product better. No
+          email addresses, no hostnames, no IPs are sent.{' '}
+          <a
+            href="https://bulwarkmail.org/docs/legal/privacy/telemetry"
+            target="_blank"
+            rel="noreferrer"
+            className="underline inline-flex items-center gap-1"
+          >
+            Full schema and policy <ExternalLink className="h-3 w-3" />
+          </a>
+        </p>
+      </header>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+          <div className="min-w-0">
+            <div className="font-medium">Status</div>
+            <div className="text-sm text-muted-foreground">
+              {status.consent === 'pending' && 'Initialising - no heartbeats sent yet.'}
+              {status.consent === 'on' && 'Heartbeats are enabled. Thanks for helping us improve!'}
+              {status.consent === 'off' && 'Heartbeats are off (default).'}
+              {envOverridden && (
+                <> Locked by <code>BULWARK_TELEMETRY</code> env var.</>
+              )}
+            </div>
+          </div>
+          <div className="flex gap-2">
+            <button
+              type="button"
+              disabled={busy === 'consent' || envOverridden || isOn}
+              onClick={() => void setConsent('on')}
+              className="px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50"
+            >
+              Enable
+            </button>
+            <button
+              type="button"
+              disabled={busy === 'consent' || envOverridden || status.consent === 'off'}
+              onClick={() => void setConsent('off')}
+              className="px-3 py-1.5 rounded-md border hover:bg-accent disabled:opacity-50"
+            >
+              Disable
+            </button>
+          </div>
+        </div>
+        <dl className="grid grid-cols-2 gap-2 text-sm pt-2 border-t">
+          <dt className="text-muted-foreground">Last sent</dt>
+          <dd>{timeAgo(status.lastSentAt)}</dd>
+          <dt className="text-muted-foreground">Next scheduled</dt>
+          <dd>{timeAgo(status.nextScheduledAt)}</dd>
+          <dt className="text-muted-foreground">Consented at</dt>
+          <dd>{status.consentedAt ? new Date(status.consentedAt).toLocaleString() : '-'}</dd>
+        </dl>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-2">
+        <div className="font-medium">Account activity</div>
+        <p className="text-sm text-muted-foreground">
+          Unique accounts that have logged in over the last 90 days. Identities are stored as a
+          per-instance HMAC, never as plaintext usernames. These are the numbers reported in the
+          heartbeat as bucketed ranges.
+        </p>
+        <dl className="grid grid-cols-2 gap-2 text-sm pt-1">
+          <dt className="text-muted-foreground">Total (90d)</dt>
+          <dd className="font-mono">{status.accountCounts?.total ?? 0}</dd>
+          <dt className="text-muted-foreground">Active (7d)</dt>
+          <dd className="font-mono">{status.accountCounts?.active7d ?? 0}</dd>
+        </dl>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="font-medium">Endpoint</div>
+        <p className="text-sm text-muted-foreground">
+          Where heartbeats are sent. Defaults to the project&apos;s collector. Point at your own collector
+          (open source at <code>bulwarkmail/dashboard</code>) or clear this field to disable sending.
+        </p>
+        <div className="flex flex-col sm:flex-row gap-2">
+          <input
+            type="url"
+            value={endpointDraft}
+            onChange={(e) => setEndpointDraft(e.target.value)}
+            placeholder={status.defaultEndpoint}
+            className="flex-1 min-w-0 px-3 py-1.5 rounded-md border bg-background"
+          />
+          <button
+            type="button"
+            disabled={busy === 'endpoint' || endpointDraft === status.endpoint}
+            onClick={() => void saveEndpoint()}
+            className="shrink-0 px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 inline-flex items-center justify-center gap-1"
+          >
+            <Save className="h-4 w-4" /> Save
+          </button>
+        </div>
+      </section>
+
+      <section className="rounded-lg border p-4 space-y-3">
+        <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
+          <div className="min-w-0">
+            <div className="font-medium">Payload preview</div>
+            <div className="text-sm text-muted-foreground">
+              Exactly what the next heartbeat would send from this install, right now.
+            </div>
+          </div>
+          <button
+            type="button"
+            disabled={busy === 'send' || !isOn}
+            onClick={() => void sendNow()}
+            className="shrink-0 px-3 py-1.5 rounded-md border bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 inline-flex items-center gap-1"
+          >
+            <Send className="h-4 w-4" /> Send now
+          </button>
+        </div>
+        {sendResult && (
+          <div
+            className={`text-sm flex items-center gap-2 ${
+              sendResult.ok ? 'text-emerald-600' : 'text-red-600'
+            }`}
+          >
+            {sendResult.ok ? <CheckCircle2 className="h-4 w-4" /> : <XCircle className="h-4 w-4" />}
+            {sendResult.msg}
+          </div>
+        )}
+        <pre className="text-xs bg-muted/50 rounded-md p-3 overflow-x-auto max-h-96">
+          {JSON.stringify(status.payloadPreview, null, 2)}
+        </pre>
+      </section>
+    </div>
+  );
+}

app/(main)/admin/_tabs/themes.tsx

@@ -5,12 +5,11 @@ import { Upload, Trash2, Power, PowerOff, Loader2, Palette, Save, Shield, Lock,
 import type { SettingsPolicy } from '@/lib/admin/types';
 import { DEFAULT_POLICY, DEFAULT_THEME_POLICY } from '@/lib/admin/types';
 import { apiFetch } from '@/lib/browser-navigation';
+import { BUILTIN_THEMES } from '@/lib/builtin-themes';
 
-const BUILTIN_THEME_OPTIONS = [
-  { id: 'builtin-nord', name: 'Nord' },
-  { id: 'builtin-catppuccin', name: 'Catppuccin' },
-  { id: 'builtin-solarized', name: 'Solarized' },
-];
+// Derive from the single source of truth so newly added built-in themes show
+// up here automatically (was previously a hardcoded subset — see #496).
+const BUILTIN_THEME_OPTIONS = BUILTIN_THEMES.map(t => ({ id: t.id, name: t.name }));
 
 interface ThemeEntry {
   id: string;
@@ -25,7 +24,7 @@ interface ThemeEntry {
   updatedAt: string;
 }
 
-export default function AdminThemesPage() {
+export function ThemesTab() {
   const [themes, setThemes] = useState<ThemeEntry[]>([]);
   const [loading, setLoading] = useState(true);
   const [uploading, setUploading] = useState(false);
@@ -307,12 +306,12 @@ export default function AdminThemesPage() {
 
   return (
     <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
           <h1 className="text-2xl font-semibold text-foreground">Themes</h1>
           <p className="text-sm text-muted-foreground mt-1">Manage themes and theme policy for all users</p>
         </div>
-        <div className="flex items-center gap-2">
+        <div className="flex flex-wrap items-center gap-2">
           {policyDirty && (
             <button
               onClick={handleSavePolicy}
@@ -344,7 +343,6 @@ export default function AdminThemesPage() {
         </div>
       )}
 
-      {/* Theme Policy */}
       <div className="border border-border rounded-lg">
         <div className="px-4 py-3 border-b border-border bg-muted/30">
           <div className="flex items-center gap-2">
@@ -355,38 +353,35 @@ export default function AdminThemesPage() {
         </div>
 
         <div className="divide-y divide-border">
-          {/* Master toggle */}
-          <div className="px-4 py-3 flex items-center justify-between gap-4">
-            <div>
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div className="min-w-0">
               <span className="text-sm text-foreground">Themes Enabled</span>
               <p className="text-xs text-muted-foreground mt-0.5">Allow users to select and apply themes</p>
             </div>
             <button onClick={toggleThemesEnabled}
-              className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${themesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${themesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
               <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${themesEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
             </button>
           </div>
 
-          {/* User uploads toggle */}
-          <div className="px-4 py-3 flex items-center justify-between gap-4">
-            <div>
+          <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+            <div className="min-w-0">
               <span className="text-sm text-foreground">User Theme Uploads</span>
               <p className="text-xs text-muted-foreground mt-0.5">Allow users to upload their own theme files</p>
             </div>
             <button onClick={toggleUserThemeUploads}
-              className={`relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${userThemesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
+              className={`shrink-0 relative inline-flex h-5 w-9 items-center rounded-full transition-colors ${userThemesEnabled ? 'bg-primary' : 'bg-muted-foreground/25 dark:bg-muted-foreground/50'}`}>
               <span className={`inline-block h-3.5 w-3.5 transform rounded-full bg-background shadow transition-transform ${userThemesEnabled ? 'translate-x-[18px]' : 'translate-x-[3px]'}`} />
             </button>
           </div>
 
-          {/* Force enable / disable all */}
           {themes.length > 0 && (
-            <div className="px-4 py-3 flex items-center justify-between gap-4">
-              <div>
+            <div className="px-4 py-3 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="min-w-0">
                 <span className="text-sm text-foreground">Force Enable / Disable All</span>
                 <p className="text-xs text-muted-foreground mt-0.5">Bulk toggle all deployed themes at once</p>
               </div>
-              <div className="flex items-center gap-2">
+              <div className="flex items-center gap-2 shrink-0">
                 <button
                   onClick={forceEnableAll}
                   className="inline-flex items-center gap-1.5 h-7 px-3 rounded-md bg-emerald-600 text-white text-xs font-medium hover:bg-emerald-700 transition-colors"
@@ -405,17 +400,16 @@ export default function AdminThemesPage() {
             </div>
           )}
 
-          {/* Default Theme */}
           <div className="px-4 py-3">
-            <div className="flex items-center justify-between gap-4">
-              <div>
+            <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
+              <div className="min-w-0">
                 <span className="text-sm text-foreground">Default Theme</span>
                 <p className="text-xs text-muted-foreground mt-0.5">Theme applied when users have not chosen one</p>
               </div>
               <select
                 value={policy.themePolicy?.defaultThemeId || ''}
                 onChange={(e) => setDefaultTheme(e.target.value || null)}
-                className="h-8 px-2 rounded-md border border-input bg-background text-sm text-foreground"
+                className="h-8 px-2 w-full sm:w-auto shrink-0 rounded-md border border-input bg-background text-sm text-foreground"
               >
                 <option value="">System Default</option>
                 <optgroup label="Built-in">
@@ -438,7 +432,6 @@ export default function AdminThemesPage() {
             </div>
           </div>
 
-          {/* Built-in themes */}
           <div className="px-4 py-3">
             <span className="text-xs font-medium uppercase tracking-wider text-muted-foreground">Built-in Themes</span>
             <div className="mt-2 space-y-2">
@@ -457,7 +450,6 @@ export default function AdminThemesPage() {
             </div>
           </div>
 
-          {/* Admin-deployed themes */}
           {themes.length > 0 && (
             <div className="px-4 py-3">
               <span className="text-xs font-medium uppercase tracking-wider text-muted-foreground">Admin-deployed Themes</span>
@@ -480,7 +472,6 @@ export default function AdminThemesPage() {
         </div>
       </div>
 
-      {/* Deployed Themes */}
       <div className="border border-border rounded-lg">
         <div className="px-4 py-3 border-b border-border bg-muted/30">
           <div className="flex items-center gap-2">
@@ -498,9 +489,9 @@ export default function AdminThemesPage() {
         ) : (
           <div className="divide-y divide-border">
             {themes.map(theme => (
-              <div key={theme.id} className="px-4 py-4 flex items-center justify-between gap-4">
+              <div key={theme.id} className="px-4 py-4 flex flex-col gap-3 sm:flex-row sm:items-center sm:justify-between sm:gap-4">
                 <div className="min-w-0 flex-1">
-                  <div className="flex items-center gap-2">
+                  <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
                     <span className="text-sm font-medium text-foreground">{theme.name}</span>
                     <span className="text-xs text-muted-foreground">v{theme.version}</span>
                     <span className={`text-xs px-1.5 py-0.5 rounded ${theme.enabled ? 'bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400' : 'bg-muted text-muted-foreground'}`}>

app/(main)/admin/_tabs/version.tsx

@@ -0,0 +1,237 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import {
+  Loader2,
+  RefreshCw,
+  CheckCircle2,
+  AlertTriangle,
+  ShieldAlert,
+  ExternalLink,
+} from 'lucide-react';
+import { SettingsSection, SettingItem } from '@/components/settings/settings-section';
+import { apiFetch } from '@/lib/browser-navigation';
+import type { UpdateStatus, UpdateSeverity } from '@/lib/version-check/types';
+
+interface VersionAdminStatus {
+  current: string;
+  build: string;
+  endpoint: string;
+  defaultEndpoint: string;
+  disabledByEnv: boolean;
+  lastCheckedAt: string | null;
+  lastSuccessAt: string | null;
+  nextScheduledAt: string | null;
+  status: UpdateStatus | null;
+}
+
+function timeAgo(iso: string | null): string {
+  if (!iso) return 'never';
+  const d = Date.now() - new Date(iso).getTime();
+  if (d < 0) return new Date(iso).toLocaleString();
+  const m = Math.floor(d / 60000);
+  if (m < 1) return 'just now';
+  if (m < 60) return `${m} min ago`;
+  const h = Math.floor(m / 60);
+  if (h < 48) return `${h} hours ago`;
+  return `${Math.floor(h / 24)} days ago`;
+}
+
+function severityChip(severity: UpdateSeverity) {
+  switch (severity) {
+    case 'security':
+      return {
+        label: 'Security update',
+        className: 'bg-red-500/10 text-red-700 dark:text-red-300 border-red-500/30',
+        Icon: ShieldAlert,
+      };
+    case 'deprecated':
+      return {
+        label: 'Deprecated',
+        className: 'bg-red-500/10 text-red-700 dark:text-red-300 border-red-500/30',
+        Icon: ShieldAlert,
+      };
+    case 'normal':
+      return {
+        label: 'Update available',
+        className: 'bg-amber-500/10 text-amber-700 dark:text-amber-300 border-amber-500/30',
+        Icon: AlertTriangle,
+      };
+    case 'unknown':
+      return {
+        label: 'Unknown',
+        className: 'bg-muted text-muted-foreground border-border',
+        Icon: AlertTriangle,
+      };
+    case 'none':
+    default:
+      return {
+        label: 'Up to date',
+        className: 'bg-emerald-500/10 text-emerald-700 dark:text-emerald-300 border-emerald-500/30',
+        Icon: CheckCircle2,
+      };
+  }
+}
+
+export function VersionTab() {
+  const [data, setData] = useState<VersionAdminStatus | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [checking, setChecking] = useState(false);
+  const [checkResult, setCheckResult] = useState<{ ok: boolean; msg: string } | null>(null);
+
+  async function refresh(): Promise<void> {
+    setLoading(true);
+    try {
+      const r = await apiFetch('/api/admin/version');
+      if (!r.ok) throw new Error('failed to load');
+      setData((await r.json()) as VersionAdminStatus);
+    } catch (err) {
+      console.error(err);
+    } finally {
+      setLoading(false);
+    }
+  }
+  useEffect(() => { void refresh(); }, []);
+
+  async function checkNow(): Promise<void> {
+    setChecking(true);
+    setCheckResult(null);
+    try {
+      const r = await apiFetch('/api/admin/version', {
+        method: 'POST',
+        headers: { 'content-type': 'application/json' },
+        body: JSON.stringify({ action: 'check-now' }),
+      });
+      const j = (await r.json().catch(() => ({}))) as { ok?: boolean; error?: string };
+      setCheckResult({
+        ok: !!j.ok,
+        msg: j.ok ? 'Update check completed.' : `Failed: ${j.error ?? 'unknown'}`,
+      });
+      await refresh();
+    } finally {
+      setChecking(false);
+    }
+  }
+
+  if (loading || !data) {
+    return (
+      <div className="p-8 flex items-center gap-2 text-muted-foreground">
+        <Loader2 className="h-4 w-4 animate-spin" /> loading…
+      </div>
+    );
+  }
+
+  const status = data.status;
+  const chip = severityChip(status?.severity ?? 'none');
+  const ChipIcon = chip.Icon;
+  const releaseUrl = status?.url ?? null;
+  const newer = status?.latest && status.latest !== data.current ? status.latest : null;
+
+  return (
+    <div className="space-y-6">
+      <div className="flex flex-wrap items-start justify-between gap-3">
+        <div className="min-w-0">
+          <h1 className="text-2xl font-semibold text-foreground">Version</h1>
+          <p className="text-sm text-muted-foreground mt-1">
+            Hourly check against the Bulwark version server. Severity is decided server-side and
+            disable with <code>BULWARK_UPDATE_CHECK=off</code>.
+          </p>
+        </div>
+        <button
+          type="button"
+          disabled={checking}
+          onClick={() => void checkNow()}
+          className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
+        >
+          {checking ? <Loader2 className="w-4 h-4 animate-spin" /> : <RefreshCw className="w-4 h-4" />}
+          Check now
+        </button>
+      </div>
+
+      {checkResult && (
+        <div
+          className={`text-sm rounded-md px-3 py-2 ${
+            checkResult.ok
+              ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300'
+              : 'bg-destructive/10 text-destructive'
+          }`}
+        >
+          {checkResult.msg}
+        </div>
+      )}
+
+      <SettingsSection title="Status">
+        <SettingItem label="Severity">
+          <span
+            className={`inline-flex items-center gap-1.5 rounded-full border px-2 py-0.5 text-xs font-medium ${chip.className}`}
+          >
+            <ChipIcon className="h-3 w-3" />
+            {chip.label}
+          </span>
+        </SettingItem>
+        <SettingItem label="Running" description={data.build !== 'unknown' ? `Build ${data.build}` : undefined}>
+          <span className="text-sm font-mono text-foreground">{data.current}</span>
+        </SettingItem>
+        {newer && (
+          <SettingItem label="Latest release">
+            {releaseUrl ? (
+              <a
+                href={releaseUrl}
+                target="_blank"
+                rel="noreferrer"
+                className="inline-flex items-center gap-1 text-sm font-mono text-foreground hover:underline"
+              >
+                {newer} <ExternalLink className="w-3 h-3" />
+              </a>
+            ) : (
+              <span className="text-sm font-mono text-foreground">{newer}</span>
+            )}
+          </SettingItem>
+        )}
+        {status?.advisory && (
+          <SettingItem label="Advisory">
+            <span className="text-sm font-mono text-red-600 dark:text-red-400">{status.advisory}</span>
+          </SettingItem>
+        )}
+      </SettingsSection>
+
+      <SettingsSection title="Schedule" description="Hourly polling with ±5 minute jitter.">
+        <SettingItem label="Last checked">
+          <span className="text-sm text-foreground">{timeAgo(data.lastCheckedAt)}</span>
+        </SettingItem>
+        <SettingItem label="Last success">
+          <span className="text-sm text-foreground">{timeAgo(data.lastSuccessAt)}</span>
+        </SettingItem>
+        <SettingItem label="Next scheduled">
+          <span className="text-sm text-foreground">{timeAgo(data.nextScheduledAt)}</span>
+        </SettingItem>
+        {status?.checkedAt && (
+          <SettingItem label="Server timestamp" description="When the server last refreshed its release list.">
+            <span className="text-sm text-foreground">{new Date(status.checkedAt).toLocaleString()}</span>
+          </SettingItem>
+        )}
+      </SettingsSection>
+
+      <SettingsSection title="Source">
+        <SettingItem
+          label="Endpoint"
+          description={data.endpoint === data.defaultEndpoint ? 'Default endpoint.' : `Default: ${data.defaultEndpoint}`}
+        >
+          <a
+            href={data.endpoint}
+            target="_blank"
+            rel="noreferrer"
+            className="inline-flex items-center gap-1 text-sm text-foreground hover:underline break-all"
+          >
+            {data.endpoint} <ExternalLink className="w-3 h-3 shrink-0" />
+          </a>
+        </SettingItem>
+        <SettingItem label="Disabled by env" description="Set BULWARK_UPDATE_CHECK=off to disable.">
+          <span className={`text-sm font-medium ${data.disabledByEnv ? 'text-amber-600 dark:text-amber-400' : 'text-muted-foreground'}`}>
+            {data.disabledByEnv ? 'Yes' : 'No'}
+          </span>
+        </SettingItem>
+      </SettingsSection>
+    </div>
+  );
+}

app/(main)/admin/auth/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=auth');
+}

app/(main)/admin/branding/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=branding');
+}

app/(main)/admin/change-password/page.tsx

@@ -65,7 +65,7 @@ export default function ChangePasswordPage() {
               value={currentPassword}
               onChange={e => setCurrentPassword(e.target.value)}
               required
-              className="w-full h-9 pl-9 pr-3 rounded-md border border-input bg-background text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
+              className="w-full h-9 ps-9 pe-3 rounded-md border border-input bg-background text-sm text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
               autoComplete="current-password"
             />
           </div>

app/(main)/admin/layout.tsx

@@ -0,0 +1,479 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+import { useRouter, usePathname } from 'next/navigation';
+import Link from 'next/link';
+import { useAdminTabStore, type AdminTabId } from '@/stores/admin-tab-store';
+import {
+  LayoutDashboard,
+  Settings,
+  Palette,
+  Shield,
+  Scale,
+  ScrollText,
+  LogOut,
+  KeyRound,
+  Puzzle,
+  SwatchBook,
+  Activity,
+  Package,
+  Mail,
+  Calendar,
+  BookUser,
+  HardDrive,
+  Store,
+  Menu,
+  X,
+} from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { useConfig } from '@/hooks/use-config';
+import { usePolicyStore } from '@/stores/policy-store';
+import { useThemeStore } from '@/stores/theme-store';
+import { getActiveAccountSlotHeaders } from '@/lib/auth/active-account-slot';
+
+import { useUpdateStore, selectHasUpdate } from '@/stores/update-store';
+import { apiFetch, getPathPrefix, withBasePath } from '@/lib/browser-navigation';
+
+// Single-page tab navigation: clicks update a Zustand store. The URL stays
+// at /admin so React doesn't fire a route transition on every tab switch -
+// matches the regular settings page pattern, fixes the dev-mode "Rendering…"
+// hang we saw with both /admin/<segment> routes and ?tab= search params.
+const NAV_GROUPS: ReadonlyArray<{
+  label: string;
+  items: ReadonlyArray<{ tab: AdminTabId; label: string; icon: typeof LayoutDashboard }>;
+}> = [
+  {
+    label: 'Overview',
+    items: [
+      { tab: 'dashboard', label: 'Dashboard', icon: LayoutDashboard },
+    ],
+  },
+  {
+    label: 'Configuration',
+    items: [
+      { tab: 'settings', label: 'Settings', icon: Settings },
+      { tab: 'branding', label: 'Branding', icon: Palette },
+      { tab: 'auth', label: 'Authentication', icon: Shield },
+      { tab: 'policy', label: 'Policy', icon: Scale },
+    ],
+  },
+  {
+    label: 'Extensions',
+    items: [
+      { tab: 'plugins', label: 'Plugins', icon: Puzzle },
+      { tab: 'themes', label: 'Themes', icon: SwatchBook },
+      { tab: 'marketplace', label: 'Marketplace', icon: Store },
+    ],
+  },
+  {
+    label: 'System',
+    items: [
+      { tab: 'version', label: 'Version', icon: Package },
+      { tab: 'telemetry', label: 'Telemetry', icon: Activity },
+      { tab: 'logs', label: 'Audit Log', icon: ScrollText },
+    ],
+  },
+];
+
+export default function AdminLayout({ children }: { children: React.ReactNode }) {
+  const router = useRouter();
+  const pathname = usePathname();
+  const storeActiveTab = useAdminTabStore((s) => s.activeTab);
+  const setActiveTab = useAdminTabStore((s) => s.setActiveTab);
+  // Highlight the active tab only on /admin itself - on dynamic routes
+  // (e.g. /admin/plugins/[id]) no tab is "current".
+  const activeTab = pathname === '/admin' ? storeActiveTab : null;
+  const [authenticated, setAuthenticated] = useState<boolean | null>(null);
+  const [authError, setAuthError] = useState<string | null>(null);
+  const [isStalwartAdmin, setIsStalwartAdmin] = useState(false);
+  const [mobileNavOpen, setMobileNavOpen] = useState(false);
+  const { appLogoLightUrl, appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
+  const filesEnabled = usePolicyStore((s) => s.isFeatureEnabled('filesEnabled'));
+  const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
+  const logoUrl = withBasePath(resolvedTheme === 'dark'
+    ? (appLogoDarkUrl || appLogoLightUrl || loginLogoDarkUrl)
+    : (appLogoLightUrl || appLogoDarkUrl || loginLogoLightUrl));
+
+  // Match the navigation rail: red for security/deprecated, amber for normal.
+  const hasUpdate = useUpdateStore(selectHasUpdate);
+  const updateSeverity = useUpdateStore((s) => s.status?.severity);
+  const startUpdatePolling = useUpdateStore((s) => s.startPolling);
+  useEffect(() => { startUpdatePolling(); }, [startUpdatePolling]);
+  const updateImportant = updateSeverity === 'security' || updateSeverity === 'deprecated';
+
+  useEffect(() => {
+    setMobileNavOpen(false);
+  }, [pathname]);
+
+  useEffect(() => {
+    if (!mobileNavOpen) return;
+    const previous = document.body.style.overflow;
+    document.body.style.overflow = 'hidden';
+    return () => {
+      document.body.style.overflow = previous;
+    };
+  }, [mobileNavOpen]);
+
+  useEffect(() => {
+    if (pathname === '/admin/login') return;
+    let cancelled = false;
+
+    async function checkAuth() {
+      try {
+        const jmapHeaders = getActiveAccountSlotHeaders();
+        const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
+        const data = await res.json();
+        if (cancelled) return;
+
+        const stalwartAdmin = data.stalwartAdmin === true;
+        setIsStalwartAdmin(stalwartAdmin);
+
+        // If neither password-based admin nor Stalwart admin, redirect away
+        if (!data.enabled && !stalwartAdmin) {
+          router.replace('/');
+          return;
+        }
+
+        if (data.authenticated) {
+          setAuthenticated(true);
+          return;
+        }
+
+        // If Stalwart admin but not yet authenticated, auto-login
+        if (stalwartAdmin) {
+          const loginRes = await apiFetch('/api/admin/auth', {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json', ...jmapHeaders },
+            body: JSON.stringify({ stalwartAuth: true }),
+          });
+          if (cancelled) return;
+          if (loginRes.ok) {
+            setAuthenticated(true);
+            return;
+          }
+          const body = await loginRes.json().catch(() => ({}));
+          setAuthError(body?.error || `Admin auto-login failed (HTTP ${loginRes.status})`);
+          setAuthenticated(false);
+          return;
+        }
+
+        router.replace('/admin/login');
+      } catch (err) {
+        if (cancelled) return;
+        setAuthError(err instanceof Error ? err.message : 'Network error during admin check');
+        setAuthenticated(false);
+      }
+    }
+
+    checkAuth();
+    return () => { cancelled = true; };
+  }, [pathname, router]);
+
+  async function handleLogout() {
+    await apiFetch('/api/admin/auth', { method: 'DELETE' });
+    router.replace('/admin/login');
+  }
+
+  // Don't gate the login page
+  if (pathname === '/admin/login') {
+    return <>{children}</>;
+  }
+
+  // /admin lives outside the [locale] tree, so links back to the webmail
+  // apps are bare <a> tags (hard navigation). Next.js only auto-applies
+  // basePath to <Link>/router APIs - for these we prepend it manually so
+  // NEXT_PUBLIC_BASE_PATH=/webmail deployments don't redirect to "/".
+  const prefix = getPathPrefix();
+
+  const navContent = (
+    <>
+      <div className="flex-1 overflow-y-auto py-2">
+        <div className="px-2 space-y-0.5">
+          {NAV_GROUPS.map((group, groupIndex) => (
+            <div key={group.label}>
+              {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
+              <div className="px-3 pt-2.5 pb-1">
+                <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+                  {group.label}
+                </span>
+              </div>
+              {group.items.map(({ tab, label, icon: Icon }) => {
+                const active = activeTab === tab;
+                const showDot = tab === 'version' && hasUpdate;
+                const handleClick = () => {
+                  setActiveTab(tab);
+                  // From a dynamic route (/admin/plugins/[id], /admin/marketplace/[slug])
+                  // we still need a real navigation back to /admin so the page renders.
+                  if (pathname !== '/admin') router.push('/admin');
+                };
+                return (
+                  <button
+                    key={tab}
+                    type="button"
+                    onClick={handleClick}
+                    className={cn(
+                      'w-full text-start px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
+                      active
+                        ? 'bg-accent text-accent-foreground font-medium'
+                        : 'hover:bg-muted text-foreground'
+                    )}
+                  >
+                    <span className="relative shrink-0">
+                      <Icon className={cn(
+                        'w-4 h-4',
+                        active ? 'text-accent-foreground' : 'text-muted-foreground'
+                      )} />
+                      {showDot && (
+                        <span
+                          className={cn(
+                            'absolute -top-0.5 -right-0.5 w-2 h-2 rounded-full ring-2',
+                            active ? 'ring-accent' : 'ring-background',
+                            updateImportant ? 'bg-red-500' : 'bg-amber-500',
+                          )}
+                          aria-label={updateImportant ? 'Important update available' : 'Update available'}
+                        />
+                      )}
+                    </span>
+                    {label}
+                  </button>
+                );
+              })}
+            </div>
+          ))}
+        </div>
+      </div>
+
+      <div className="px-2 py-2 border-t border-border space-y-0.5 shrink-0">
+        {!isStalwartAdmin && (
+          <Link
+            href="/admin/change-password"
+            className={cn(
+              'w-full text-start px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
+              pathname === '/admin/change-password'
+                ? 'bg-accent text-accent-foreground font-medium'
+                : 'hover:bg-muted text-foreground'
+            )}
+          >
+            <KeyRound className={cn(
+              'w-4 h-4 shrink-0',
+              pathname === '/admin/change-password' ? 'text-accent-foreground' : 'text-muted-foreground'
+            )} />
+            Change Password
+          </Link>
+        )}
+        <button
+          onClick={handleLogout}
+          className="w-full text-start px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5 hover:bg-muted text-foreground"
+        >
+          <LogOut className="w-4 h-4 shrink-0 text-muted-foreground" />
+          Sign out
+        </button>
+      </div>
+    </>
+  );
+
+  return (
+    <div className="min-h-screen flex bg-background">
+      {/* Slim webmail nav rail (desktop only) */}
+      <nav className="hidden md:flex w-14 bg-secondary flex-col items-center py-3 gap-2 border-e border-border sticky top-0 h-screen shrink-0">
+        {logoUrl ? (
+          <img src={logoUrl} alt="" className="w-7 h-7 object-contain mb-2" />
+        ) : (
+          <div className="w-7 h-7 mb-2" />
+        )}
+        <a
+          href={`${prefix}/`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Mail"
+        >
+          <Mail className="w-[18px] h-[18px]" />
+        </a>
+        <a
+          href={`${prefix}/calendar`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Calendar"
+        >
+          <Calendar className="w-[18px] h-[18px]" />
+        </a>
+        <a
+          href={`${prefix}/contacts`}
+          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+          title="Contacts"
+        >
+          <BookUser className="w-[18px] h-[18px]" />
+        </a>
+        {filesEnabled && (
+          <a
+            href={`${prefix}/files`}
+            className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+            title="Files"
+          >
+            <HardDrive className="w-[18px] h-[18px]" />
+          </a>
+        )}
+        <div className="mt-auto flex flex-col items-center gap-2">
+          <div className="flex items-center justify-center w-10 h-10 rounded-md bg-primary/10 text-primary" title="Admin">
+            <Shield className="w-[18px] h-[18px]" />
+          </div>
+          <a
+            href={`${prefix}/settings`}
+            className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
+            title="Settings"
+          >
+            <Settings className="w-[18px] h-[18px]" />
+          </a>
+        </div>
+      </nav>
+
+      {/* Admin Sidebar (desktop only) */}
+      <aside className="hidden md:flex w-60 border-e border-border bg-secondary flex-col sticky top-0 h-screen">
+        <div className="h-14 flex items-center px-4 border-b border-border shrink-0">
+          {logoUrl ? (
+            <img src={logoUrl} alt="" className="w-5 h-5 object-contain me-2" />
+          ) : (
+            <Shield className="w-5 h-5 text-primary me-2" />
+          )}
+          <span className="font-semibold text-sm text-foreground">Admin Panel</span>
+        </div>
+        {navContent}
+      </aside>
+
+      {/* Mobile drawer overlay */}
+      {mobileNavOpen && (
+        <div
+          className="md:hidden fixed inset-0 z-40 bg-black/50 backdrop-blur-sm"
+          onClick={() => setMobileNavOpen(false)}
+          aria-hidden="true"
+        />
+      )}
+
+      {/* Mobile drawer */}
+      <aside
+        className={cn(
+          'md:hidden fixed inset-y-0 left-0 z-50 w-72 max-w-[85vw] border-e border-border bg-secondary flex flex-col transition-transform duration-200 ease-out',
+          mobileNavOpen ? 'translate-x-0' : '-translate-x-full'
+        )}
+        aria-label="Admin navigation"
+        aria-hidden={!mobileNavOpen}
+      >
+        <div className="h-14 flex items-center justify-between px-3 border-b border-border shrink-0">
+          <div className="flex items-center min-w-0">
+            {logoUrl ? (
+              <img src={logoUrl} alt="" className="w-5 h-5 object-contain me-2" />
+            ) : (
+              <Shield className="w-5 h-5 text-primary me-2" />
+            )}
+            <span className="font-semibold text-sm text-foreground truncate">Admin Panel</span>
+          </div>
+          <button
+            type="button"
+            onClick={() => setMobileNavOpen(false)}
+            className="flex items-center justify-center w-9 h-9 rounded-md text-muted-foreground hover:text-foreground hover:bg-muted transition-colors"
+            aria-label="Close navigation"
+          >
+            <X className="w-5 h-5" />
+          </button>
+        </div>
+        {navContent}
+      </aside>
+
+      {/* Main content */}
+      <main className="flex-1 min-w-0 overflow-x-hidden">
+        {/* Mobile header */}
+        <div className="md:hidden sticky top-0 z-30 h-14 flex items-center gap-2 px-3 border-b border-border bg-background">
+          <button
+            type="button"
+            onClick={() => setMobileNavOpen(true)}
+            className="flex items-center justify-center w-9 h-9 rounded-md text-foreground hover:bg-muted transition-colors"
+            aria-label="Open navigation"
+          >
+            <Menu className="w-5 h-5" />
+          </button>
+          <div className="flex items-center min-w-0">
+            {logoUrl ? (
+              <img src={logoUrl} alt="" className="w-5 h-5 object-contain me-2" />
+            ) : (
+              <Shield className="w-5 h-5 text-primary me-2" />
+            )}
+            <span className="font-semibold text-sm text-foreground truncate">Admin Panel</span>
+          </div>
+        </div>
+
+        <div className="max-w-4xl mx-auto p-4 md:p-6 pb-[calc(4rem+env(safe-area-inset-bottom))] md:pb-6">
+          {authError ? (
+            <div className="rounded-lg border border-destructive/40 bg-destructive/10 p-4 text-sm text-destructive">
+              <p className="font-medium">Admin authentication failed</p>
+              <p className="mt-1 text-destructive/80">{authError}</p>
+            </div>
+          ) : authenticated === null ? (
+            <div className="py-12 text-center text-sm text-muted-foreground animate-pulse">
+              Loading admin panel…
+            </div>
+          ) : authenticated ? (
+            children
+          ) : null}
+        </div>
+      </main>
+
+      {/* Mobile bottom nav (main webmail nav) */}
+      <nav
+        className="md:hidden fixed inset-x-0 bottom-0 z-30 flex items-center bg-background border-t border-border pb-[env(safe-area-inset-bottom)]"
+        aria-label="Main navigation"
+      >
+        <a
+          href={`${prefix}/`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Mail"
+        >
+          <Mail className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Mail</span>
+        </a>
+        <a
+          href={`${prefix}/calendar`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Calendar"
+        >
+          <Calendar className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Calendar</span>
+        </a>
+        <a
+          href={`${prefix}/contacts`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Contacts"
+        >
+          <BookUser className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Contacts</span>
+        </a>
+        {filesEnabled && (
+          <a
+            href={`${prefix}/files`}
+            className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+            title="Files"
+          >
+            <HardDrive className="w-5 h-5" />
+            <span className="text-[10px] font-medium leading-tight truncate max-w-full">Files</span>
+          </a>
+        )}
+        <div
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] text-primary"
+          title="Admin"
+          aria-current="page"
+        >
+          <div className="relative">
+            <Shield className="w-5 h-5" />
+            <span className="absolute -bottom-1 left-1/2 -translate-x-1/2 w-4 h-0.5 rounded-full bg-primary" />
+          </div>
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Admin</span>
+        </div>
+        <a
+          href={`${prefix}/settings`}
+          className="flex flex-col items-center justify-center gap-1 py-2 px-1 min-h-[44px] grow shrink-0 basis-[64px] transition-colors duration-150 text-muted-foreground hover:text-foreground"
+          title="Settings"
+        >
+          <Settings className="w-5 h-5" />
+          <span className="text-[10px] font-medium leading-tight truncate max-w-full">Settings</span>
+        </a>
+      </nav>
+    </div>
+  );
+}

app/(main)/admin/login/page.tsx

@@ -5,7 +5,7 @@ import { useRouter } from 'next/navigation';
 import { Shield } from 'lucide-react';
 import { useConfig } from '@/hooks/use-config';
 import { useThemeStore } from '@/stores/theme-store';
-import { apiFetch } from '@/lib/browser-navigation';
+import { apiFetch, withBasePath } from '@/lib/browser-navigation';
 
 export default function AdminLoginPage() {
   const router = useRouter();
@@ -14,7 +14,7 @@ export default function AdminLoginPage() {
   const [loading, setLoading] = useState(false);
   const { loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
   const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
-  const logoUrl = resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl;
+  const logoUrl = withBasePath(resolvedTheme === 'dark' ? loginLogoDarkUrl : loginLogoLightUrl);
 
   async function handleSubmit(e: FormEvent) {
     e.preventDefault();
@@ -47,13 +47,13 @@ export default function AdminLoginPage() {
     <div className="min-h-screen flex items-center justify-center bg-background px-4">
       <div className="w-full max-w-sm">
         <div className="flex flex-col items-center mb-8">
-          <div className="w-12 h-12 rounded-xl bg-primary/10 flex items-center justify-center mb-4">
-            {logoUrl ? (
-              <img src={logoUrl} alt="" className="w-8 h-8 object-contain" />
-            ) : (
+          {logoUrl ? (
+            <img src={logoUrl} alt="" className="h-12 object-contain mb-4" />
+          ) : (
+            <div className="w-12 h-12 rounded-xl bg-primary/10 flex items-center justify-center mb-4">
               <Shield className="w-6 h-6 text-primary" />
-            )}
-          </div>
+            </div>
+          )}
           <h1 className="text-xl font-semibold text-foreground">Admin Dashboard</h1>
           <p className="text-sm text-muted-foreground mt-1">Enter your admin password to continue</p>
         </div>

app/(main)/admin/logs/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=logs');
+}

app/(main)/admin/marketplace/[slug]/page.tsx

@@ -0,0 +1,620 @@
+'use client';
+
+import { useEffect, useState, useCallback } from 'react';
+import { useParams } from 'next/navigation';
+import Link from 'next/link';
+import {
+  ArrowLeft,
+  ArrowUpCircle,
+  Download,
+  Loader2,
+  Puzzle,
+  SwatchBook,
+  Star,
+  Trash2,
+  Check,
+  Settings as SettingsIcon,
+  ExternalLink,
+  Shield,
+  AlertTriangle,
+  FileCode,
+  ChevronDown,
+  ChevronUp,
+} from 'lucide-react';
+import { apiFetch } from '@/lib/browser-navigation';
+import { compareVersions, isVersionSatisfied } from '@/lib/version-compare';
+
+const CURRENT_APP_VERSION = process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0';
+
+interface PreviewData {
+  extension: {
+    slug: string;
+    name: string;
+    type: 'plugin' | 'theme';
+    pluginType: string | null;
+    description: string;
+    longDescription: string | null;
+    tags: string[];
+    permissions: string[];
+    totalDownloads: number;
+    featured: boolean;
+    githubRepo: string | null;
+    license: string | null;
+    minAppVersion: string | null;
+    iconUrl: string | null;
+    bannerUrl: string | null;
+    author: {
+      displayName: string;
+      githubLogin: string;
+      avatarUrl: string | null;
+      verified?: boolean;
+    } | null;
+    latestVersion: string | null;
+    versions: Array<{
+      version: string;
+      changelog: string | null;
+      bundleSize: number;
+      minAppVersion: string | null;
+      publishedAt: string | null;
+      permissions: string[];
+    }>;
+    screenshots: Array<{ url: string; altText: string | null }>;
+    themePreviews: Array<{
+      variant: 'light' | 'dark';
+      previewPath: string;
+      colors: Record<string, string> | null;
+    }>;
+    createdAt: string | null;
+    updatedAt: string | null;
+  };
+  bundle: {
+    manifest: Record<string, unknown> | null;
+    source: { name: string; content: string; truncated: boolean } | null;
+    size: number;
+    error: string | null;
+  };
+  installed: boolean;
+  installedVersion: string | null;
+}
+
+const RISKY_PERMISSIONS = new Set([
+  'mail:write',
+  'mail:delete',
+  'storage:write',
+  'network',
+  'admin',
+]);
+
+export default function MarketplacePreviewPage() {
+  const params = useParams();
+  const slug = params.slug as string;
+
+  const [data, setData] = useState<PreviewData | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [installing, setInstalling] = useState(false);
+  const [uninstalling, setUninstalling] = useState(false);
+  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
+  const [showSource, setShowSource] = useState(false);
+  const [showManifest, setShowManifest] = useState(false);
+
+  const fetchPreview = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const res = await apiFetch(`/api/admin/marketplace/${encodeURIComponent(slug)}`);
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        setError(body.error || 'Failed to load preview');
+        return;
+      }
+      setData(await res.json());
+    } catch {
+      setError('Failed to connect to extension directory');
+    } finally {
+      setLoading(false);
+    }
+  }, [slug]);
+
+  useEffect(() => { fetchPreview(); }, [fetchPreview]);
+
+  async function handleInstall() {
+    if (!data) return;
+    const isUpdate = data.installed;
+    const targetVersion = data.extension.latestVersion || '1.0.0';
+    setInstalling(true);
+    setMessage(null);
+    try {
+      const res = await apiFetch('/api/admin/marketplace', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          slug: data.extension.slug,
+          version: targetVersion,
+          type: data.extension.type,
+        }),
+      });
+      const body = await res.json();
+      if (res.ok) {
+        const warnings = body.warnings?.length ? ` (${body.warnings.length} warning(s))` : '';
+        setMessage({
+          type: 'success',
+          text: isUpdate
+            ? `"${data.extension.name}" updated to v${targetVersion}${warnings}`
+            : `"${data.extension.name}" installed${warnings}`,
+        });
+        setData(prev => prev ? { ...prev, installed: true, installedVersion: targetVersion } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || (isUpdate ? 'Update failed' : 'Installation failed') });
+      }
+    } catch {
+      setMessage({ type: 'error', text: isUpdate ? 'Update failed - network error' : 'Installation failed - network error' });
+    } finally {
+      setInstalling(false);
+    }
+  }
+
+  async function handleUninstall() {
+    if (!data) return;
+    if (!confirm(`Remove "${data.extension.name}"? This cannot be undone.`)) return;
+
+    setUninstalling(true);
+    setMessage(null);
+    try {
+      const endpoint = data.extension.type === 'theme'
+        ? '/api/admin/themes'
+        : '/api/admin/plugins';
+      const res = await apiFetch(endpoint, {
+        method: 'DELETE',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ id: data.extension.slug }),
+      });
+      const body = await res.json().catch(() => ({}));
+      if (res.ok) {
+        setMessage({ type: 'success', text: `"${data.extension.name}" removed` });
+        setData(prev => prev ? { ...prev, installed: false } : prev);
+      } else {
+        setMessage({ type: 'error', text: body.error || 'Uninstall failed' });
+      }
+    } catch {
+      setMessage({ type: 'error', text: 'Uninstall failed - network error' });
+    } finally {
+      setUninstalling(false);
+    }
+  }
+
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">
+        <Loader2 className="w-4 h-4 animate-spin me-2" />
+        Loading...
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="space-y-4">
+        <Link
+          href="/admin/marketplace"
+          className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+        >
+          <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+        </Link>
+        <p className="text-sm text-destructive">{error || 'Extension not found'}</p>
+      </div>
+    );
+  }
+
+  const ext = data.extension;
+  const bundle = data.bundle;
+  const isPlugin = ext.type === 'plugin';
+  const manifestPerms = (bundle.manifest?.permissions as string[] | undefined) || ext.permissions || [];
+  const frameOrigins = (bundle.manifest?.frameOrigins as string[] | undefined) || [];
+  const settingsSchema = bundle.manifest?.settingsSchema as Record<string, { type: string; label: string; description?: string; default?: unknown }> | undefined;
+  const versionMismatch = !!ext.minAppVersion && !isVersionSatisfied(CURRENT_APP_VERSION, ext.minAppVersion);
+  const updateAvailable = data.installed
+    && !!data.installedVersion
+    && !!ext.latestVersion
+    && compareVersions(ext.latestVersion, data.installedVersion) > 0
+    && !versionMismatch;
+
+  return (
+    <div className="space-y-6 max-w-4xl">
+      {/* Back link */}
+      <Link
+        href="/admin/marketplace"
+        className="inline-flex items-center gap-1.5 text-sm text-muted-foreground hover:text-foreground"
+      >
+        <ArrowLeft className="w-4 h-4" /> Back to Marketplace
+      </Link>
+
+      {/* Banner / hero */}
+      {ext.bannerUrl && (
+        <div className="mb-6 overflow-hidden rounded-lg border border-border bg-muted">
+          <img
+            src={ext.bannerUrl}
+            alt=""
+            className="block w-full max-h-64 object-cover"
+            loading="lazy"
+          />
+        </div>
+      )}
+
+      {/* Header */}
+      <div className="flex flex-col gap-4 sm:flex-row sm:items-start">
+        <div className="flex items-start gap-4 flex-1 min-w-0">
+          <div className="w-14 h-14 rounded-lg bg-muted flex items-center justify-center shrink-0 overflow-hidden">
+            {ext.iconUrl ? (
+              <img
+                src={ext.iconUrl}
+                alt=""
+                className="w-14 h-14 object-cover"
+                loading="lazy"
+              />
+            ) : isPlugin ? (
+              <Puzzle className="w-7 h-7 text-muted-foreground" />
+            ) : (
+              <SwatchBook className="w-7 h-7 text-muted-foreground" />
+            )}
+          </div>
+          <div className="flex-1 min-w-0">
+            <div className="flex flex-wrap items-center gap-x-2 gap-y-1">
+              <h1 className="text-2xl font-semibold text-foreground break-words min-w-0">{ext.name}</h1>
+              {ext.featured && <Star className="w-4 h-4 text-warning fill-warning shrink-0" />}
+              {data.installed && !updateAvailable && (
+                <span
+                  className="inline-flex items-center gap-1 text-xs px-2 py-0.5 rounded-md bg-emerald-100 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-400 font-medium"
+                  title={data.installedVersion ? `Installed: v${data.installedVersion}` : undefined}
+                >
+                  <Check className="w-3 h-3" /> Installed
+                </span>
+              )}
+              {data.installed && updateAvailable && (
+                <span
+                  className="inline-flex items-center gap-1 text-xs px-2 py-0.5 rounded-md bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400 font-medium"
+                  title={`Installed v${data.installedVersion} → v${ext.latestVersion} available`}
+                >
+                  <ArrowUpCircle className="w-3 h-3" /> Update available
+                </span>
+              )}
+            </div>
+            <div className="flex items-center gap-2 mt-1 text-sm text-muted-foreground flex-wrap">
+              <span className={`text-[10px] px-1.5 py-0.5 rounded font-medium ${
+                isPlugin
+                  ? 'bg-blue-100 text-blue-700 dark:bg-blue-950/30 dark:text-blue-400'
+                  : 'bg-purple-100 text-purple-700 dark:bg-purple-950/30 dark:text-purple-400'
+              }`}>
+                {isPlugin ? (ext.pluginType || 'plugin') : 'theme'}
+              </span>
+              {ext.author && (
+                <span>by {ext.author.displayName}</span>
+              )}
+              {ext.latestVersion && <span>v{ext.latestVersion}</span>}
+              {ext.license && <span>{ext.license}</span>}
+              <span className="inline-flex items-center gap-1">
+                <Download className="w-3 h-3" />
+                {ext.totalDownloads.toLocaleString()}
+              </span>
+            </div>
+          </div>
+        </div>
+
+        {/* Action buttons */}
+        <div className="flex flex-wrap items-center gap-2 shrink-0">
+          {data.installed ? (
+            <>
+              {updateAvailable && (
+                <button
+                  onClick={handleInstall}
+                  disabled={installing || !!bundle.error}
+                  title={`Update from v${data.installedVersion} to v${ext.latestVersion}`}
+                  className="inline-flex items-center gap-1.5 h-9 px-4 rounded-md bg-blue-600 text-white text-sm font-medium hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+                >
+                  {installing ? <Loader2 className="w-4 h-4 animate-spin" /> : <ArrowUpCircle className="w-4 h-4" />}
+                  Update to v{ext.latestVersion}
+                </button>
+              )}
+              <Link
+                href={isPlugin ? `/admin/plugins/${ext.slug}` : '/admin/themes'}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md border border-border text-sm font-medium text-foreground hover:bg-muted transition-colors"
+              >
+                <SettingsIcon className="w-4 h-4" />
+                Manage
+              </Link>
+              <button
+                onClick={handleUninstall}
+                disabled={uninstalling}
+                className="inline-flex items-center gap-1.5 h-9 px-3 rounded-md bg-destructive text-destructive-foreground text-sm font-medium hover:bg-destructive/90 disabled:opacity-50 transition-colors"
+              >
+                {uninstalling ? <Loader2 className="w-4 h-4 animate-spin" /> : <Trash2 className="w-4 h-4" />}
+                Uninstall
+              </button>
+            </>
+          ) : (
+            <button
+              onClick={handleInstall}
+              disabled={installing || !!bundle.error || versionMismatch}
+              title={versionMismatch
+                ? `Requires app v${ext.minAppVersion}+. You are running v${CURRENT_APP_VERSION}. Update Bulwark to install.`
+                : undefined}
+              className="inline-flex items-center gap-1.5 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+            >
+              {installing ? <Loader2 className="w-4 h-4 animate-spin" /> : <Download className="w-4 h-4" />}
+              Install
+            </button>
+          )}
+        </div>
+      </div>
+
+      {message && (
+        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
+          {message.text}
+        </div>
+      )}
+
+      {versionMismatch && (
+        <div className="flex items-start gap-2 text-sm rounded-md px-3 py-2 bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+          <AlertTriangle className="w-4 h-4 shrink-0 mt-0.5" />
+          <div>
+            <p className="font-medium">Update Bulwark to install this extension</p>
+            <p className="text-xs mt-0.5 opacity-90">
+              Requires app v{ext.minAppVersion}+. You are running v{CURRENT_APP_VERSION}.
+            </p>
+          </div>
+        </div>
+      )}
+
+      {bundle.error && (
+        <div className="flex items-start gap-2 text-sm rounded-md px-3 py-2 bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300">
+          <AlertTriangle className="w-4 h-4 shrink-0 mt-0.5" />
+          <div>
+            <p className="font-medium">Could not preview bundle</p>
+            <p className="text-xs mt-0.5 opacity-90">{bundle.error}</p>
+          </div>
+        </div>
+      )}
+
+      {/* Description */}
+      <section className="border border-border rounded-lg p-4">
+        <h2 className="text-sm font-medium text-foreground">About</h2>
+        <p className="text-sm text-muted-foreground mt-2">{ext.description}</p>
+        {ext.longDescription && ext.longDescription !== ext.description && (
+          <p className="text-sm text-muted-foreground mt-3 whitespace-pre-wrap">{ext.longDescription}</p>
+        )}
+        {ext.tags.length > 0 && (
+          <div className="flex flex-wrap gap-1 mt-3">
+            {ext.tags.map(tag => (
+              <span key={tag} className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">
+                {tag}
+              </span>
+            ))}
+          </div>
+        )}
+        <div className="flex items-center gap-3 text-xs text-muted-foreground mt-4 pt-3 border-t border-border flex-wrap">
+          {ext.minAppVersion && <span>Requires app v{ext.minAppVersion}+</span>}
+          {bundle.size > 0 && <span>Bundle: {(bundle.size / 1024).toFixed(1)} KB</span>}
+          {ext.githubRepo && (
+            <a
+              href={`https://github.com/${ext.githubRepo}`}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="inline-flex items-center gap-1 hover:text-foreground"
+            >
+              <ExternalLink className="w-3 h-3" />
+              {ext.githubRepo}
+            </a>
+          )}
+        </div>
+      </section>
+
+      {/* Screenshots */}
+      {ext.screenshots.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Screenshots</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.screenshots.map((s, i) => (
+              <img
+                key={i}
+                src={s.url}
+                alt={s.altText || `Screenshot ${i + 1}`}
+                className="w-full rounded-md border border-border bg-muted"
+                loading="lazy"
+              />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Theme color preview */}
+      {!isPlugin && ext.themePreviews.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Theme preview</h2>
+          <div className="grid grid-cols-1 sm:grid-cols-2 gap-3 mt-3">
+            {ext.themePreviews.map(preview => (
+              <ThemeColorSwatch key={preview.variant} preview={preview} />
+            ))}
+          </div>
+        </section>
+      )}
+
+      {/* Permissions */}
+      {isPlugin && (
+        <section className="border border-border rounded-lg p-4">
+          <div className="flex items-center gap-2">
+            <Shield className="w-4 h-4 text-muted-foreground" />
+            <h2 className="text-sm font-medium text-foreground">Permissions</h2>
+          </div>
+          {manifestPerms.length === 0 ? (
+            <p className="text-sm text-muted-foreground mt-2">This plugin requests no permissions.</p>
+          ) : (
+            <ul className="mt-3 space-y-1.5">
+              {manifestPerms.map(perm => {
+                const risky = RISKY_PERMISSIONS.has(perm);
+                return (
+                  <li
+                    key={perm}
+                    className={`flex items-center gap-2 text-sm rounded-md px-2 py-1 ${
+                      risky
+                        ? 'bg-amber-50 text-amber-800 dark:bg-amber-950/30 dark:text-amber-300'
+                        : 'bg-muted/50 text-foreground'
+                    }`}
+                  >
+                    {risky && <AlertTriangle className="w-3.5 h-3.5 shrink-0" />}
+                    <code className="font-mono text-xs">{perm}</code>
+                  </li>
+                );
+              })}
+            </ul>
+          )}
+          {frameOrigins.length > 0 && (
+            <div className="mt-4 pt-3 border-t border-border">
+              <h3 className="text-xs font-medium text-foreground">Iframe origins</h3>
+              <p className="text-xs text-muted-foreground mt-0.5">
+                The plugin will be allowed to embed content from these origins.
+              </p>
+              <ul className="mt-2 space-y-1">
+                {frameOrigins.map(origin => (
+                  <li key={origin} className="text-xs font-mono text-foreground bg-muted/50 px-2 py-1 rounded">
+                    {origin}
+                  </li>
+                ))}
+              </ul>
+            </div>
+          )}
+        </section>
+      )}
+
+      {/* Settings schema preview */}
+      {isPlugin && settingsSchema && Object.keys(settingsSchema).length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">User settings</h2>
+          <p className="text-xs text-muted-foreground mt-0.5">Settings users will be able to configure after install.</p>
+          <ul className="mt-3 divide-y divide-border">
+            {Object.entries(settingsSchema).map(([key, field]) => (
+              <li key={key} className="py-2">
+                <div className="flex items-center gap-2">
+                  <code className="text-xs font-mono text-foreground">{key}</code>
+                  <span className="text-[10px] px-1.5 py-0.5 rounded bg-muted text-muted-foreground">{field.type}</span>
+                </div>
+                <div className="text-sm text-foreground mt-0.5">{field.label}</div>
+                {field.description && (
+                  <div className="text-xs text-muted-foreground mt-0.5">{field.description}</div>
+                )}
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+
+      {/* Source / manifest disclosure */}
+      {bundle.manifest && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowManifest(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-start hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">manifest.json</h2>
+            </div>
+            {showManifest ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showManifest && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre">
+              {JSON.stringify(bundle.manifest, null, 2)}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {bundle.source && (
+        <section className="border border-border rounded-lg">
+          <button
+            onClick={() => setShowSource(v => !v)}
+            className="w-full flex items-center justify-between gap-2 px-4 py-3 text-start hover:bg-muted/30 transition-colors"
+          >
+            <div className="flex items-center gap-2">
+              <FileCode className="w-4 h-4 text-muted-foreground" />
+              <h2 className="text-sm font-medium text-foreground">{bundle.source.name}</h2>
+              {bundle.source.truncated && (
+                <span className="text-[10px] px-1.5 py-0.5 rounded bg-amber-100 text-amber-700 dark:bg-amber-950/30 dark:text-amber-400">truncated</span>
+              )}
+            </div>
+            {showSource ? <ChevronUp className="w-4 h-4 text-muted-foreground" /> : <ChevronDown className="w-4 h-4 text-muted-foreground" />}
+          </button>
+          {showSource && (
+            <pre className="px-4 pb-4 text-xs font-mono overflow-x-auto text-foreground whitespace-pre max-h-[600px] overflow-y-auto">
+              {bundle.source.content}
+            </pre>
+          )}
+        </section>
+      )}
+
+      {/* Version history */}
+      {ext.versions.length > 0 && (
+        <section className="border border-border rounded-lg p-4">
+          <h2 className="text-sm font-medium text-foreground">Version history</h2>
+          <ul className="mt-3 divide-y divide-border">
+            {ext.versions.slice(0, 5).map(v => (
+              <li key={v.version} className="py-2 flex items-start justify-between gap-3">
+                <div className="min-w-0 flex-1">
+                  <div className="flex items-center gap-2">
+                    <code className="text-xs font-mono text-foreground">v{v.version}</code>
+                    {v.publishedAt && (
+                      <span className="text-xs text-muted-foreground">
+                        {new Date(v.publishedAt).toLocaleDateString()}
+                      </span>
+                    )}
+                  </div>
+                  {v.changelog && (
+                    <p className="text-xs text-muted-foreground mt-0.5 whitespace-pre-wrap">{v.changelog}</p>
+                  )}
+                </div>
+                <span className="text-xs text-muted-foreground shrink-0">
+                  {(v.bundleSize / 1024).toFixed(1)} KB
+                </span>
+              </li>
+            ))}
+          </ul>
+        </section>
+      )}
+    </div>
+  );
+}
+
+function ThemeColorSwatch({ preview }: { preview: { variant: 'light' | 'dark'; colors: Record<string, string> | null } }) {
+  const colors = preview.colors || {};
+  const bg = colors.background || (preview.variant === 'dark' ? '#0f0f10' : '#ffffff');
+  const fg = colors.foreground || (preview.variant === 'dark' ? '#fafafa' : '#0a0a0a');
+  const accent = colors.primary || colors.accent || '#7c5cff';
+  const muted = colors.muted || (preview.variant === 'dark' ? '#1a1a1c' : '#f5f5f5');
+  const border = colors.border || (preview.variant === 'dark' ? '#27272a' : '#e5e5e5');
+
+  return (
+    <div className="rounded-md border border-border overflow-hidden">
+      <div className="px-3 py-2 text-xs font-medium text-muted-foreground bg-muted/30 border-b border-border capitalize">
+        {preview.variant}
+      </div>
+      <div className="p-3 space-y-2" style={{ background: bg, color: fg }}>
+        <div className="flex items-center gap-2">
+          <span className="inline-block w-6 h-6 rounded" style={{ background: accent }} />
+          <span className="text-sm font-medium" style={{ color: fg }}>Sample text</span>
+        </div>
+        <div className="rounded p-2 text-xs" style={{ background: muted, border: `1px solid ${border}` }}>
+          <span style={{ color: fg }}>Card surface</span>
+        </div>
+        <div className="flex flex-wrap gap-1">
+          {Object.entries(colors).slice(0, 6).map(([key, value]) => (
+            <span
+              key={key}
+              title={`${key}: ${value}`}
+              className="inline-block w-4 h-4 rounded border"
+              style={{ background: value, borderColor: border }}
+            />
+          ))}
+        </div>
+      </div>
+    </div>
+  );
+}

app/(main)/admin/marketplace/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=marketplace');
+}

app/(main)/admin/page.tsx

@@ -0,0 +1,49 @@
+'use client';
+
+import { useEffect } from 'react';
+import { useAdminTabStore, isAdminTab } from '@/stores/admin-tab-store';
+import { DashboardTab } from './_tabs/dashboard';
+import { SettingsTab } from './_tabs/settings';
+import { BrandingTab } from './_tabs/branding';
+import { AuthTab } from './_tabs/auth';
+import { PolicyTab } from './_tabs/policy';
+import { PluginsTab } from './_tabs/plugins';
+import { ThemesTab } from './_tabs/themes';
+import { MarketplaceTab } from './_tabs/marketplace';
+import { VersionTab } from './_tabs/version';
+import { TelemetryTab } from './_tabs/telemetry';
+import { LogsTab } from './_tabs/logs';
+
+export default function AdminPage() {
+  const activeTab = useAdminTabStore((s) => s.activeTab);
+  const setActiveTab = useAdminTabStore((s) => s.setActiveTab);
+
+  // Honour deep links from the old route structure: /admin?tab=settings
+  // (emitted by the redirect pages in /admin/<x>/page.tsx) sets the store
+  // once on mount, then strips the param so the URL stays at /admin and
+  // subsequent tab clicks don't accumulate query strings.
+  useEffect(() => {
+    if (typeof window === 'undefined') return;
+    const url = new URL(window.location.href);
+    const fromUrl = url.searchParams.get('tab');
+    if (isAdminTab(fromUrl)) {
+      setActiveTab(fromUrl);
+      url.searchParams.delete('tab');
+      window.history.replaceState(null, '', url.pathname + url.search + url.hash);
+    }
+  }, [setActiveTab]);
+
+  switch (activeTab) {
+    case 'dashboard': return <DashboardTab />;
+    case 'settings': return <SettingsTab />;
+    case 'branding': return <BrandingTab />;
+    case 'auth': return <AuthTab />;
+    case 'policy': return <PolicyTab />;
+    case 'plugins': return <PluginsTab />;
+    case 'themes': return <ThemesTab />;
+    case 'marketplace': return <MarketplaceTab />;
+    case 'version': return <VersionTab />;
+    case 'telemetry': return <TelemetryTab />;
+    case 'logs': return <LogsTab />;
+  }
+}

app/(main)/admin/plugins/[id]/page.tsx

@@ -0,0 +1,7 @@
+import { redirect } from 'next/navigation';
+
+// Inline panel handles plugin config now - see _tabs/plugin-config-panel.tsx.
+// Old deep links land on the plugins tab; the user clicks the gear again.
+export default function Page() {
+  redirect('/admin?tab=plugins');
+}

app/(main)/admin/plugins/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=plugins');
+}

app/(main)/admin/policy/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=policy');
+}

app/(main)/admin/settings/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=settings');
+}

app/(main)/admin/telemetry/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=telemetry');
+}

app/(main)/admin/themes/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=themes');
+}

app/(main)/admin/version/page.tsx

@@ -0,0 +1,5 @@
+import { redirect } from 'next/navigation';
+
+export default function Page() {
+  redirect('/admin?tab=version');
+}

app/(main)/global-error.tsx

@@ -44,7 +44,7 @@ export default function GlobalError({
               onClick={reset}
               className="inline-flex items-center px-4 py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 transition-colors"
             >
-              <RefreshCw className="w-4 h-4 mr-2" />
+              <RefreshCw className="w-4 h-4 me-2" />
               Try again
             </button>
           </div>

app/(main)/layout.tsx

@@ -0,0 +1,141 @@
+import type { Metadata, Viewport } from "next";
+import { getLocaleDirection } from "@/i18n/direction";
+import { Geist, Geist_Mono } from "next/font/google";
+import { headers } from "next/headers";
+import { getLocale, getTranslations } from "next-intl/server";
+import { ServiceWorkerRegistration } from "@/components/service-worker-registration";
+import { FaviconBadge } from "@/components/favicon-badge";
+import { configManager } from "@/lib/admin/config-manager";
+import {
+  matchDomainBranding,
+  parseDomainBranding,
+  pickRequestHost,
+} from "@/lib/admin/domain-branding";
+import { withBasePath } from "@/lib/browser-navigation";
+import { locales } from "@/i18n/routing";
+import "../globals.css";
+
+// This layout renders <html> and sits ABOVE the [locale] segment, so
+// next-intl's getLocale() returns the default locale here - emitting
+// <html lang="en"> on e.g. /de pages, which makes browsers offer to
+// "translate this page". Recover the active locale from the request pathname
+// (exposed by proxy.ts as x-pathname), falling back to getLocale() (cookie /
+// Accept-Language) when the path carries no locale segment.
+async function resolveRequestLocale(): Promise<string> {
+  const pathname = (await headers()).get("x-pathname") || "";
+  const seg = pathname.split("/").find((s) => (locales as readonly string[]).includes(s));
+  return seg ?? (await getLocale());
+}
+
+const geistSans = Geist({
+  variable: "--font-geist-sans",
+  subsets: ["latin"],
+});
+
+const geistMono = Geist_Mono({
+  variable: "--font-geist-mono",
+  subsets: ["latin"],
+});
+
+export const viewport: Viewport = {
+  width: "device-width",
+  initialScale: 1,
+  viewportFit: "cover",
+};
+
+export async function generateMetadata(): Promise<Metadata> {
+  await configManager.ensureLoaded();
+  // The <head> favicon must honor per-domain branding, exactly like
+  // /api/config, app/manifest.ts, and /api/pwa-icon already do. Resolve the
+  // request host and prefer its override; fall back to the global
+  // admin/env/default value when the host has no favicon override (#585).
+  const host = pickRequestHost(await headers());
+  const domainOverride = matchDomainBranding(
+    host,
+    parseDomainBranding(configManager.get<unknown>("domainBranding", [])),
+  ).faviconUrl;
+  const faviconUrl =
+    domainOverride && domainOverride.length > 0
+      ? domainOverride
+      : configManager.get<string>("faviconUrl", "/branding/Bulwark_Favicon.svg");
+  // Localize the <head> description to match the UI language; a hardcoded
+  // English description is another signal that makes Chrome offer to
+  // "translate this page". Resolve the locale from the request path, since this
+  // layout is above the [locale] segment (see resolveRequestLocale).
+  const locale = await resolveRequestLocale();
+  const t = await getTranslations({ locale });
+
+  return {
+    title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
+    description: t("meta_description"),
+    // A private webmail should not be indexed by search engines. This is opt-in
+    // via Settings -> General; the default (false) emits noindex/nofollow.
+    robots: configManager.get<boolean>("searchEngineIndexing", false)
+      ? { index: true, follow: true }
+      : { index: false, follow: false },
+    appleWebApp: {
+      capable: true,
+      statusBarStyle: "black-translucent",
+      title: process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail",
+    },
+    formatDetection: {
+      telephone: false,
+    },
+    icons: { icon: withBasePath(faviconUrl) },
+  };
+}
+
+export default async function RootLayout({
+  children,
+}: {
+  children: React.ReactNode;
+}) {
+  const locale = await resolveRequestLocale();
+  const nonce = (await headers()).get("x-nonce") ?? "";
+  const parentOrigin = process.env.NEXT_PUBLIC_PARENT_ORIGIN || "";
+
+  return (
+    <html lang={locale} dir={getLocaleDirection(locale)} suppressHydrationWarning>
+      <head>
+        <meta name="theme-color" content="#ffffff" />
+        <meta name="mobile-web-app-capable" content="yes" />
+        <meta name="apple-mobile-web-app-capable" content="yes" />
+        <meta
+          name="apple-mobile-web-app-title"
+          content={process.env.APP_NAME || process.env.NEXT_PUBLIC_APP_NAME || "Webmail"}
+        />
+        <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
+        {parentOrigin && (
+          <meta name="parent-origin" content={parentOrigin} />
+        )}
+        <script
+          nonce={nonce}
+          suppressHydrationWarning
+          dangerouslySetInnerHTML={{
+            __html: `
+              (function() {
+                try {
+                  const stored = localStorage.getItem('theme-storage');
+                  const theme = stored ? JSON.parse(stored).state.theme : 'system';
+                  const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
+                  const resolved = theme === 'system' ? systemTheme : theme;
+                  document.documentElement.classList.remove('light', 'dark');
+                  document.documentElement.classList.add(resolved);
+                } catch (e) {
+                  document.documentElement.classList.add('light');
+                }
+              })();
+            `,
+          }}
+        />
+      </head>
+      <body
+        className={`${geistSans.variable} ${geistMono.variable} antialiased`}
+      >
+        <ServiceWorkerRegistration />
+        <FaviconBadge />
+        {children}
+      </body>
+    </html>
+  );
+}

app/(main)/not-found.tsx

@@ -2,34 +2,43 @@
 
 import { useEffect } from "react";
 import { useAuthStore } from "@/stores/auth-store";
+import { getPathPrefix } from "@/lib/browser-navigation";
 
 export default function NotFound() {
   const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
 
   useEffect(() => {
     if (!isAuthenticated) {
-      // Don't redirect admin routes to the webmail login page
-      const isAdminRoute = window.location.pathname === '/admin' || window.location.pathname.startsWith('/admin/');
+      const prefix = getPathPrefix();
+      // Don't redirect admin routes to the webmail login page. Admin paths
+      // are mounted relative to the deployment prefix, so account for it.
+      const adminBase = `${prefix}/admin`;
+      const isAdminRoute = window.location.pathname === adminBase || window.location.pathname.startsWith(`${adminBase}/`);
       if (!isAdminRoute) {
-        window.location.href = "/login";
+        window.location.href = `${prefix}/login`;
       }
     }
   }, [isAuthenticated]);
 
   if (!isAuthenticated) {
-    // Allow admin routes to render the 404 without redirecting
-    const isAdmin = typeof window !== 'undefined' &&
-      (window.location.pathname === '/admin' || window.location.pathname.startsWith('/admin/'));
+    let isAdmin = false;
+    if (typeof window !== 'undefined') {
+      const prefix = getPathPrefix();
+      const adminBase = `${prefix}/admin`;
+      isAdmin = window.location.pathname === adminBase || window.location.pathname.startsWith(`${adminBase}/`);
+    }
     if (!isAdmin) return null;
   }
 
+  const prefix = typeof window !== 'undefined' ? getPathPrefix() : '';
+
   return (
     <div className="min-h-screen flex items-center justify-center bg-background">
       <div className="text-center max-w-md px-4">
         <h1 className="text-4xl font-bold text-foreground mb-2">404</h1>
         <p className="text-muted-foreground mb-6">This page could not be found.</p>
         <a
-          href="/"
+          href={`${prefix}/`}
           className="inline-flex items-center px-4 py-2 bg-primary text-primary-foreground rounded-lg hover:opacity-90 transition-opacity"
         >
           Go home

app/(main)/protocol/mailto/page.tsx

@@ -0,0 +1,8 @@
+import { getTranslations } from "next-intl/server";
+import { MailtoProtocolClient } from "@/components/protocol/mailto-protocol-client";
+
+export default async function MailtoProtocolPage() {
+  const t = await getTranslations("protocol_handlers");
+
+  return <MailtoProtocolClient openingText={t("opening_mailto")} />;
+}

app/(main)/protocol/webcal/page.tsx

@@ -0,0 +1,8 @@
+import { getTranslations } from "next-intl/server";
+import { WebcalProtocolClient } from "@/components/protocol/webcal-protocol-client";
+
+export default async function WebcalProtocolPage() {
+  const t = await getTranslations("protocol_handlers");
+
+  return <WebcalProtocolClient openingText={t("opening_webcal")} />;
+}

app/(main)/setup/layout.tsx

@@ -0,0 +1,5 @@
+import type { ReactNode } from 'react';
+
+export default function SetupLayout({ children }: { children: ReactNode }) {
+  return <div className="min-h-screen bg-background text-foreground">{children}</div>;
+}

app/(sandbox)/layout.tsx

@@ -0,0 +1,26 @@
+import type { Metadata } from 'next';
+import type { ReactNode } from 'react';
+
+// The plugin sandbox iframe runs with an opaque origin (the `sandbox`
+// attribute in production excludes `allow-same-origin` for isolation). Any
+// asset request from this layout - bundled fonts, globals.css, etc. - is then
+// cross-origin from the "null" origin to the host origin and gets blocked
+// (fonts in particular require CORS). So this layout is intentionally minimal:
+// no font imports, no CSS imports. Plugins ship their own styles, and both the
+// plugin bundle and all host API calls travel over the postMessage RPC bridge,
+// so the sandbox never fetches same-origin assets itself.
+
+export const metadata: Metadata = {
+  title: 'Plugin sandbox',
+  robots: { index: false, follow: false },
+};
+
+export default function PluginSandboxLayout({ children }: { children: ReactNode }) {
+  return (
+    <html lang="en">
+      <body style={{ margin: 0, padding: 0, background: 'transparent' }}>
+        {children}
+      </body>
+    </html>
+  );
+}

app/(sandbox)/plugin-sandbox-privileged/page.tsx

@@ -0,0 +1,15 @@
+import { SandboxRuntime } from '@/lib/plugin-sandbox/runtime';
+
+// Privileged-tier sandbox route. Identical runtime to /plugin-sandbox, but the
+// host loads it into a same-origin (`allow-same-origin`) iframe so the bundle
+// gets real `crypto.subtle` + IndexedDB. The trust gate (signature + admin
+// approval) is enforced host-side before this route is ever framed; the page
+// itself carries no extra privilege.
+//
+// Must be dynamic so the per-request CSP nonce from proxy.ts is embedded in
+// Next's injected hydration/chunk scripts.
+export const dynamic = 'force-dynamic';
+
+export default function PrivilegedPluginSandboxPage() {
+  return <SandboxRuntime />;
+}

app/(sandbox)/plugin-sandbox/page.tsx

@@ -0,0 +1,10 @@
+import { SandboxRuntime } from '@/lib/plugin-sandbox/runtime';
+
+// Must be dynamic so the per-request CSP nonce from proxy.ts is embedded in
+// Next's injected hydration/chunk scripts. With force-static, those scripts
+// render without a nonce and the strict sandbox CSP blocks them.
+export const dynamic = 'force-dynamic';
+
+export default function PluginSandboxPage() {
+  return <SandboxRuntime />;
+}

app/[locale]/settings/page.tsx

@@ -1,536 +0,0 @@
-"use client";
-
-import { useState, useEffect, useRef } from 'react';
-import { useRouter } from '@/i18n/navigation';
-import { useTranslations } from 'next-intl';
-import {
-  ArrowLeft,
-  ChevronRight,
-  LogOut,
-  Settings as SettingsIcon,
-  Palette,
-  User,
-  Shield,
-  UserPen,
-  PalmtreeIcon,
-  Calendar,
-  Filter,
-  FileText,
-  FolderOpen,
-  Tags,
-  HardDrive,
-  BookUser,
-  KeyRound,
-  PanelLeftClose,
-  Bell,
-  Puzzle,
-  LayoutGrid,
-  BookOpen,
-  PenLine,
-  EyeOff,
-  Languages,
-  Info,
-  Bug,
-  type LucideIcon,
-} from 'lucide-react';
-import { Button } from '@/components/ui/button';
-import { AppearanceSettings } from '@/components/settings/appearance-settings';
-import { LayoutSettings } from '@/components/settings/layout-settings';
-import { LanguageSettings } from '@/components/settings/language-settings';
-import { ReadingSettings } from '@/components/settings/reading-settings';
-import { ComposingSettings } from '@/components/settings/composing-settings';
-import { ContentSendersSettings } from '@/components/settings/content-senders-settings';
-import { AccountSettings } from '@/components/settings/account-settings';
-import { IdentitySettings } from '@/components/settings/identity-settings';
-import { VacationSettings } from '@/components/settings/vacation-settings';
-import { CalendarSettings } from '@/components/settings/calendar-settings';
-import { CalendarManagementSettings } from '@/components/settings/calendar-management-settings';
-import { AddressBookManagementSettings } from '@/components/settings/address-book-management-settings';
-import { FilterSettings } from '@/components/settings/filter-settings';
-import { TemplateSettings } from '@/components/settings/template-settings';
-import { AboutDataSettings } from '@/components/settings/about-data-settings';
-import { DebugSettings } from '@/components/settings/debug-settings';
-import { FolderSettings } from '@/components/settings/folder-settings';
-import { KeywordSettings } from '@/components/settings/keyword-settings';
-import { AccountSecuritySettings } from '@/components/settings/account-security-settings';
-import { FilesSettingsComponent } from '@/components/settings/files-settings';
-import { ContactsSettings } from '@/components/settings/contacts-settings';
-import { SmimeSettings } from '@/components/settings/smime-settings';
-import { SidebarAppsSettings } from '@/components/settings/sidebar-apps-settings';
-import { NotificationSettings } from '@/components/settings/notification-settings';
-import { ThemesSettings } from '@/components/settings/themes-settings';
-import { PluginsSettings } from '@/components/settings/plugins-settings';
-import { useAuthStore, redirectToLogin } from '@/stores/auth-store';
-import { useEmailStore } from '@/stores/email-store';
-import { useIsDesktop } from '@/hooks/use-media-query';
-import { NavigationRail } from '@/components/layout/navigation-rail';
-import { SidebarAppsModal } from '@/components/layout/sidebar-apps-modal';
-import { InlineAppView } from '@/components/layout/inline-app-view';
-import { useSidebarApps } from '@/hooks/use-sidebar-apps';
-import { ResizeHandle } from '@/components/layout/resize-handle';
-import { useConfig } from '@/hooks/use-config';
-import { usePolicyStore } from '@/stores/policy-store';
-import { cn } from '@/lib/utils';
-
-type Tab =
-  | 'account'
-  | 'language'
-  | 'notifications'
-  | 'appearance'
-  | 'layout'
-  | 'reading'
-  | 'composing'
-  | 'identities'
-  | 'vacation'
-  | 'filters'
-  | 'templates'
-  | 'folders'
-  | 'keywords'
-  | 'security'
-  | 'encryption'
-  | 'content_senders'
-  | 'calendar'
-  | 'contacts'
-  | 'files'
-  | 'sidebar_apps'
-  | 'about_data'
-  | 'themes'
-  | 'plugins'
-  | 'debug';
-
-type TabGroup = 'general' | 'appearance' | 'mail' | 'privacy' | 'apps' | 'advanced';
-
-interface TabDef {
-  id: Tab;
-  label: string;
-  icon: LucideIcon;
-  group: TabGroup;
-  experimental?: boolean;
-}
-
-const tabIcons: Record<Tab, LucideIcon> = {
-  account: User,
-  language: Languages,
-  notifications: Bell,
-  appearance: Palette,
-  layout: LayoutGrid,
-  reading: BookOpen,
-  composing: PenLine,
-  identities: UserPen,
-  vacation: PalmtreeIcon,
-  filters: Filter,
-  templates: FileText,
-  folders: FolderOpen,
-  keywords: Tags,
-  security: Shield,
-  encryption: KeyRound,
-  content_senders: EyeOff,
-  calendar: Calendar,
-  contacts: BookUser,
-  files: HardDrive,
-  sidebar_apps: PanelLeftClose,
-  about_data: Info,
-  themes: Palette,
-  plugins: Puzzle,
-  debug: Bug,
-};
-
-const tabGroupOrder: TabGroup[] = ['general', 'appearance', 'mail', 'privacy', 'apps', 'advanced'];
-
-// Map legacy tab IDs to current ones; runs once on read of localStorage.
-const LEGACY_TAB_MAP: Record<string, Tab> = {
-  email: 'reading',
-  advanced: 'about_data',
-};
-
-function readPersistedTab(): Tab {
-  try {
-    const saved = localStorage.getItem('settings-active-tab');
-    if (!saved) return 'appearance';
-    if (saved in LEGACY_TAB_MAP) {
-      const migrated = LEGACY_TAB_MAP[saved];
-      try { localStorage.setItem('settings-active-tab', migrated); } catch { /* ignore */ }
-      return migrated;
-    }
-    return saved as Tab;
-  } catch {
-    return 'appearance';
-  }
-}
-
-export default function SettingsPage() {
-  const router = useRouter();
-  const t = useTranslations('settings');
-  const tSidebar = useTranslations('sidebar');
-  const { client, isAuthenticated, logout, checkAuth, isLoading: authLoading } = useAuthStore();
-  const { showAppsModal, inlineApp, loadedApps, handleManageApps, handleInlineApp, closeInlineApp, closeAppsModal } = useSidebarApps();
-  const [initialCheckDone, setInitialCheckDone] = useState(() => useAuthStore.getState().isAuthenticated && !!useAuthStore.getState().client);
-  const { quota, isPushConnected } = useEmailStore();
-  const { stalwartFeaturesEnabled } = useConfig();
-  const { isFeatureEnabled } = usePolicyStore();
-  const [activeTab, setActiveTab] = useState<Tab>(readPersistedTab);
-  const [mobileShowContent, setMobileShowContent] = useState(false);
-  const isDesktop = useIsDesktop();
-
-  // Sidebar resize state
-  const [settingsSidebarWidth, setSettingsSidebarWidth] = useState(() => {
-    try { const v = localStorage.getItem('settings-sidebar-width'); return v ? Number(v) : 256; } catch { return 256; }
-  });
-  const [isResizing, setIsResizing] = useState(false);
-  const dragStartWidth = useRef(256);
-
-  // Check auth on mount – skip when already authenticated so that navigating
-  // between routes doesn't retrigger checkAuth's transient `{ client: null,
-  // isLoading: true }` reset, which was flashing the spinner on every nav.
-  useEffect(() => {
-    const state = useAuthStore.getState();
-    if (state.isAuthenticated && state.client) {
-      setInitialCheckDone(true);
-      return;
-    }
-    checkAuth().finally(() => {
-      setInitialCheckDone(true);
-    });
-  }, [checkAuth]);
-
-  // Listen for tab change events from child components (with legacy migration)
-  useEffect(() => {
-    const handler = (e: Event) => {
-      const raw = (e as CustomEvent).detail as string;
-      if (!raw) return;
-      const tab = (LEGACY_TAB_MAP[raw] ?? raw) as Tab;
-      setActiveTab(tab);
-      try { localStorage.setItem('settings-active-tab', tab); } catch { /* ignore */ }
-    };
-    window.addEventListener('settings-tab-change', handler);
-    return () => window.removeEventListener('settings-tab-change', handler);
-  }, []);
-
-  useEffect(() => {
-    if (initialCheckDone && !isAuthenticated && !authLoading) {
-      try { sessionStorage.setItem('redirect_after_login', window.location.pathname); } catch { /* ignore */ }
-      redirectToLogin();
-    }
-  }, [initialCheckDone, isAuthenticated, authLoading]);
-
-  if (!isAuthenticated) {
-    return null;
-  }
-
-  const supportsVacation = client?.supportsVacationResponse() ?? false;
-  const supportsCalendar = client?.supportsCalendars() ?? false;
-  const supportsSieve = client?.supportsSieve() ?? false;
-  const supportsFiles = client?.supportsFiles() ?? false;
-
-  const tabs: TabDef[] = [
-    // General
-    { id: 'account', label: t('tabs.account'), icon: tabIcons.account, group: 'general' },
-    { id: 'language', label: t('tabs.language'), icon: tabIcons.language, group: 'general' },
-    { id: 'notifications', label: t('tabs.notifications'), icon: tabIcons.notifications, group: 'general' },
-
-    // Appearance
-    { id: 'appearance', label: t('tabs.appearance'), icon: tabIcons.appearance, group: 'appearance' },
-    { id: 'layout', label: t('tabs.layout'), icon: tabIcons.layout, group: 'appearance' },
-
-    // Mail
-    { id: 'reading', label: t('tabs.reading'), icon: tabIcons.reading, group: 'mail' },
-    { id: 'composing', label: t('tabs.composing'), icon: tabIcons.composing, group: 'mail' },
-    { id: 'identities', label: t('tabs.identities'), icon: tabIcons.identities, group: 'mail' },
-    ...(supportsVacation ? [{ id: 'vacation' as Tab, label: t('tabs.vacation'), icon: tabIcons.vacation, group: 'mail' as TabGroup }] : []),
-    ...(supportsSieve ? [{ id: 'filters' as Tab, label: t('tabs.filters'), icon: tabIcons.filters, group: 'mail' as TabGroup }] : []),
-    ...(isFeatureEnabled('templatesEnabled') ? [{ id: 'templates' as Tab, label: t('tabs.templates'), icon: tabIcons.templates, group: 'mail' as TabGroup }] : []),
-    { id: 'folders', label: t('tabs.folders'), icon: tabIcons.folders, group: 'mail' },
-    ...(isFeatureEnabled('customKeywordsEnabled') ? [{ id: 'keywords' as Tab, label: t('tabs.keywords'), icon: tabIcons.keywords, group: 'mail' as TabGroup }] : []),
-
-    // Privacy & Security
-    ...(stalwartFeaturesEnabled ? [{ id: 'security' as Tab, label: t('tabs.security'), icon: tabIcons.security, group: 'privacy' as TabGroup }] : []),
-    ...(isFeatureEnabled('smimeEnabled') ? [{ id: 'encryption' as Tab, label: t('tabs.encryption'), icon: tabIcons.encryption, group: 'privacy' as TabGroup }] : []),
-    { id: 'content_senders', label: t('tabs.content_senders'), icon: tabIcons.content_senders, group: 'privacy' },
-
-    // Apps
-    ...(supportsCalendar ? [{ id: 'calendar' as Tab, label: t('tabs.calendar'), icon: tabIcons.calendar, group: 'apps' as TabGroup }] : []),
-    { id: 'contacts', label: t('tabs.contacts'), icon: tabIcons.contacts, group: 'apps' },
-    ...(supportsFiles ? [{ id: 'files' as Tab, label: t('tabs.files'), icon: tabIcons.files, group: 'apps' as TabGroup }] : []),
-    ...(isFeatureEnabled('sidebarAppsEnabled') ? [{ id: 'sidebar_apps' as Tab, label: t('tabs.sidebar_apps'), icon: tabIcons.sidebar_apps, group: 'apps' as TabGroup }] : []),
-
-    // Advanced
-    { id: 'about_data', label: t('tabs.about_data'), icon: tabIcons.about_data, group: 'advanced' },
-    ...(isFeatureEnabled('themesEnabled') ? [{ id: 'themes' as Tab, label: 'Themes', icon: tabIcons.themes, group: 'advanced' as TabGroup, experimental: true }] : []),
-    ...(isFeatureEnabled('pluginsEnabled') ? [{ id: 'plugins' as Tab, label: 'Plugins', icon: tabIcons.plugins, group: 'advanced' as TabGroup, experimental: true }] : []),
-    ...(isFeatureEnabled('debugModeEnabled') ? [{ id: 'debug' as Tab, label: t('tabs.debug'), icon: tabIcons.debug, group: 'advanced' as TabGroup }] : []),
-  ];
-
-  // Group tabs by category
-  const groupedTabs = tabGroupOrder
-    .map((group) => ({
-      group,
-      label: t(`tab_groups.${group}`),
-      items: tabs.filter((tab) => tab.group === group),
-    }))
-    .filter((g) => g.items.length > 0);
-
-  // If active tab is not in the visible list (e.g., feature disabled), fall back.
-  const isActiveVisible = tabs.some((tab) => tab.id === activeTab);
-  const effectiveActiveTab: Tab = isActiveVisible ? activeTab : 'appearance';
-
-  const handleTabSelect = (tabId: Tab) => {
-    setActiveTab(tabId);
-    try { localStorage.setItem('settings-active-tab', tabId); } catch { /* ignore */ }
-    if (!isDesktop) {
-      setMobileShowContent(true);
-    }
-  };
-
-  const activeTabLabel = tabs.find((tab) => tab.id === effectiveActiveTab)?.label ?? '';
-
-  const renderTabContent = () => (
-    <>
-      {effectiveActiveTab === 'account' && <AccountSettings />}
-      {effectiveActiveTab === 'language' && <LanguageSettings />}
-      {effectiveActiveTab === 'notifications' && <NotificationSettings />}
-      {effectiveActiveTab === 'appearance' && <AppearanceSettings />}
-      {effectiveActiveTab === 'layout' && <LayoutSettings />}
-      {effectiveActiveTab === 'reading' && <ReadingSettings />}
-      {effectiveActiveTab === 'composing' && <ComposingSettings />}
-      {effectiveActiveTab === 'identities' && <IdentitySettings />}
-      {effectiveActiveTab === 'vacation' && <VacationSettings />}
-      {effectiveActiveTab === 'filters' && <FilterSettings />}
-      {effectiveActiveTab === 'templates' && <TemplateSettings />}
-      {effectiveActiveTab === 'folders' && <FolderSettings />}
-      {effectiveActiveTab === 'keywords' && <KeywordSettings />}
-      {effectiveActiveTab === 'security' && <AccountSecuritySettings />}
-      {effectiveActiveTab === 'encryption' && <SmimeSettings />}
-      {effectiveActiveTab === 'content_senders' && <ContentSendersSettings />}
-      {effectiveActiveTab === 'calendar' && <><CalendarSettings /><div className="mt-8"><CalendarManagementSettings /></div></>}
-      {effectiveActiveTab === 'contacts' && <><ContactsSettings /><div className="mt-8"><AddressBookManagementSettings /></div></>}
-      {effectiveActiveTab === 'files' && <FilesSettingsComponent />}
-      {effectiveActiveTab === 'sidebar_apps' && <SidebarAppsSettings />}
-      {effectiveActiveTab === 'about_data' && <AboutDataSettings />}
-      {effectiveActiveTab === 'themes' && <ThemesSettings />}
-      {effectiveActiveTab === 'plugins' && <PluginsSettings />}
-      {effectiveActiveTab === 'debug' && <DebugSettings />}
-    </>
-  );
-
-  // Mobile layout
-  if (!isDesktop) {
-    if (mobileShowContent) {
-      return (
-        <div className="flex flex-col h-dvh bg-background">
-          <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
-            <Button
-              variant="ghost"
-              size="icon"
-              onClick={() => setMobileShowContent(false)}
-              className="h-10 w-10"
-            >
-              <ArrowLeft className="w-5 h-5" />
-            </Button>
-            <h1 className="font-semibold text-lg truncate">{activeTabLabel}</h1>
-          </div>
-
-          <div className="flex-1 overflow-y-auto p-4">
-            <div className="bg-card border border-border rounded-lg p-4">
-              {renderTabContent()}
-            </div>
-          </div>
-
-          <NavigationRail
-            orientation="horizontal"
-            onManageApps={handleManageApps}
-            onInlineApp={handleInlineApp}
-            onCloseInlineApp={closeInlineApp}
-            activeAppId={inlineApp?.id ?? null}
-          />
-          <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-        </div>
-      );
-    }
-
-    return (
-      <div className="flex flex-col h-dvh bg-background">
-        <div className="flex items-center gap-2 px-4 h-14 border-b border-border bg-background shrink-0">
-          <Button
-            variant="ghost"
-            size="icon"
-            onClick={() => router.push('/')}
-            className="h-10 w-10"
-          >
-            <ArrowLeft className="w-5 h-5" />
-          </Button>
-          <div className="flex items-center gap-2">
-            <SettingsIcon className="w-5 h-5 text-muted-foreground" />
-            <h1 className="font-semibold text-lg">{t('title')}</h1>
-          </div>
-        </div>
-
-        <div className="flex-1 overflow-y-auto">
-          <div className="py-2">
-            {groupedTabs.map((group, groupIndex) => (
-              <div key={group.group}>
-                {groupIndex > 0 && <div className="mx-5 my-2 border-t border-border" />}
-                <div className="px-5 pt-3 pb-1.5">
-                  <span className="text-xs font-semibold uppercase tracking-wider text-muted-foreground">
-                    {group.label}
-                  </span>
-                </div>
-                {group.items.map((tab) => {
-                  const Icon = tab.icon;
-                  return (
-                    <button
-                      key={tab.id}
-                      onClick={() => handleTabSelect(tab.id)}
-                      className="w-full flex items-center justify-between px-5 py-3.5 text-sm text-foreground hover:bg-muted transition-colors duration-150"
-                    >
-                      <span className="flex items-center gap-3">
-                        <Icon className="w-4 h-4 text-muted-foreground" />
-                        {tab.label}
-                        {tab.experimental && (
-                          <span className="text-[10px] font-medium px-1.5 py-0.5 rounded-full bg-warning/15 text-warning">
-                            Experimental
-                          </span>
-                        )}
-                      </span>
-                      <ChevronRight className="w-4 h-4 text-muted-foreground" />
-                    </button>
-                  );
-                })}
-              </div>
-            ))}
-          </div>
-
-          <div className="border-t border-border px-5 py-3">
-            <button
-              onClick={logout}
-              className="w-full flex items-center gap-3 py-2.5 text-sm text-destructive hover:bg-muted rounded-md px-2 transition-colors duration-150"
-            >
-              <LogOut className="w-4 h-4" />
-              <span>{tSidebar('sign_out')}</span>
-            </button>
-          </div>
-        </div>
-
-        <NavigationRail
-          orientation="horizontal"
-          onManageApps={handleManageApps}
-          onInlineApp={handleInlineApp}
-          onCloseInlineApp={closeInlineApp}
-          activeAppId={inlineApp?.id ?? null}
-        />
-        <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-      </div>
-    );
-  }
-
-  // Desktop layout
-  return (
-    <div className="flex h-dvh bg-background">
-      <div className="w-14 bg-secondary flex flex-col flex-shrink-0" style={{ borderRight: '1px solid rgba(128, 128, 128, 0.3)' }}>
-        <NavigationRail
-          collapsed
-          quota={quota}
-          isPushConnected={isPushConnected}
-          onLogout={logout}
-          onManageApps={handleManageApps}
-          onInlineApp={handleInlineApp}
-          onCloseInlineApp={closeInlineApp}
-          activeAppId={inlineApp?.id ?? null}
-        />
-      </div>
-
-      {inlineApp && (
-        <InlineAppView apps={loadedApps} activeAppId={inlineApp!.id} onClose={closeInlineApp} className="flex-1" />
-      )}
-      {!inlineApp && (
-      <>
-      <div
-        className={cn(
-          "border-r border-border bg-secondary flex flex-col",
-          !isResizing && "transition-[width] duration-300"
-        )}
-        style={{ width: `${settingsSidebarWidth}px` }}
-      >
-        <div className="p-4 border-b border-border">
-          <Button
-            variant="ghost"
-            size="sm"
-            onClick={() => router.push('/')}
-            className="w-full justify-start"
-          >
-            <ArrowLeft className="w-4 h-4 mr-2" />
-            {t('back_to_mail')}
-          </Button>
-        </div>
-
-        <div className="flex-1 overflow-y-auto py-2" data-tour="settings-tabs">
-          <div className="px-2 space-y-0.5">
-            {groupedTabs.map((group, groupIndex) => (
-              <div key={group.group}>
-                {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
-                <div className="px-3 pt-2.5 pb-1">
-                  <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
-                    {group.label}
-                  </span>
-                </div>
-                {group.items.map((tab) => {
-                  const Icon = tab.icon;
-                  return (
-                    <button
-                      key={tab.id}
-                      onClick={() => setActiveTab(tab.id)}
-                      className={cn(
-                        'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
-                        effectiveActiveTab === tab.id
-                          ? 'bg-accent text-accent-foreground font-medium'
-                          : 'hover:bg-muted text-foreground'
-                      )}
-                    >
-                      <Icon className={cn(
-                        'w-4 h-4 shrink-0',
-                        effectiveActiveTab === tab.id ? 'text-accent-foreground' : 'text-muted-foreground'
-                      )} />
-                      {tab.label}
-                      {tab.experimental && (
-                        <span className="ml-auto text-[10px] font-medium px-1.5 py-0.5 rounded-full bg-warning/15 text-warning shrink-0">
-                          Experimental
-                        </span>
-                      )}
-                    </button>
-                  );
-                })}
-              </div>
-            ))}
-          </div>
-        </div>
-      </div>
-
-      <ResizeHandle
-        onResizeStart={() => { dragStartWidth.current = settingsSidebarWidth; setIsResizing(true); }}
-        onResize={(delta) => setSettingsSidebarWidth(Math.max(180, Math.min(400, dragStartWidth.current + delta)))}
-        onResizeEnd={() => {
-          setIsResizing(false);
-          localStorage.setItem('settings-sidebar-width', String(settingsSidebarWidth));
-        }}
-        onDoubleClick={() => { setSettingsSidebarWidth(256); localStorage.setItem('settings-sidebar-width', '256'); }}
-      />
-
-      <div className="flex-1 overflow-y-auto">
-        <div className="max-w-3xl mx-auto p-8">
-          <div className="mb-6">
-            <div className="flex items-center gap-2.5 mb-2">
-              <SettingsIcon className="w-6 h-6 text-muted-foreground" />
-              <h1 className="text-2xl font-semibold text-foreground">{t('title')}</h1>
-            </div>
-          </div>
-
-          <div className="bg-card border border-border rounded-lg p-6">
-            {renderTabContent()}
-          </div>
-        </div>
-      </div>
-      </>
-      )}
-      <SidebarAppsModal isOpen={showAppsModal} onClose={closeAppsModal} />
-    </div>
-  );
-}

app/admin/branding/page.tsx

@@ -1,300 +0,0 @@
-'use client';
-
-import { useEffect, useRef, useState } from 'react';
-import { Save, Loader2, RotateCcw, ImageIcon, Upload, Trash2 } from 'lucide-react';
-import { apiFetch } from '@/lib/browser-navigation';
-
-interface ConfigEntry {
-  value: unknown;
-  source: 'admin' | 'env' | 'default';
-}
-
-const IMAGE_FIELDS = [
-  { key: 'faviconUrl', label: 'Favicon', accept: '.svg,.png,.ico,.webp' },
-  { key: 'appLogoLightUrl', label: 'App Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
-  { key: 'appLogoDarkUrl', label: 'App Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
-  { key: 'loginLogoLightUrl', label: 'Login Logo (Light Mode)', accept: '.svg,.png,.jpg,.webp' },
-  { key: 'loginLogoDarkUrl', label: 'Login Logo (Dark Mode)', accept: '.svg,.png,.jpg,.webp' },
-];
-
-const TEXT_FIELDS = [
-  { key: 'loginCompanyName', label: 'Company Name' },
-  { key: 'loginImprintUrl', label: 'Imprint URL' },
-  { key: 'loginPrivacyPolicyUrl', label: 'Privacy Policy URL' },
-  { key: 'loginWebsiteUrl', label: 'Company Website URL' },
-];
-
-export default function AdminBrandingPage() {
-  const [config, setConfig] = useState<Record<string, ConfigEntry>>({});
-  const [edits, setEdits] = useState<Record<string, unknown>>({});
-  const [loading, setLoading] = useState(true);
-  const [saving, setSaving] = useState(false);
-  const [uploading, setUploading] = useState<string | null>(null);
-  const [message, setMessage] = useState<{ type: 'success' | 'error'; text: string } | null>(null);
-  const fileInputRefs = useRef<Record<string, HTMLInputElement | null>>({});
-
-  useEffect(() => {
-    fetchConfig();
-  }, []);
-
-  async function fetchConfig() {
-    setLoading(true);
-    const res = await apiFetch('/api/admin/config');
-    if (res.ok) setConfig(await res.json());
-    setLoading(false);
-  }
-
-  function handleChange(key: string, value: string) {
-    setEdits(prev => ({ ...prev, [key]: value }));
-    setMessage(null);
-  }
-
-  function currentValue(key: string): string {
-    if (key in edits) return edits[key] as string;
-    return (config[key]?.value as string) ?? '';
-  }
-
-  async function handleSave() {
-    if (Object.keys(edits).length === 0) return;
-    setSaving(true);
-    setMessage(null);
-
-    const res = await apiFetch('/api/admin/config', {
-      method: 'PATCH',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify(edits),
-    });
-
-    if (res.ok) {
-      setMessage({ type: 'success', text: 'Branding updated. Changes visible on next page load.' });
-      setEdits({});
-      await fetchConfig();
-    } else {
-      const data = await res.json();
-      setMessage({ type: 'error', text: data.error || 'Failed to save' });
-    }
-    setSaving(false);
-  }
-
-  async function handleUpload(slot: string, file: File) {
-    setUploading(slot);
-    setMessage(null);
-
-    const formData = new FormData();
-    formData.append('file', file);
-    formData.append('slot', slot);
-
-    const res = await apiFetch('/api/admin/branding', {
-      method: 'POST',
-      body: formData,
-    });
-
-    if (res.ok) {
-      const data = await res.json();
-      setMessage({ type: 'success', text: `Uploaded ${file.name} successfully.` });
-      // Remove any pending URL edit for this slot since upload sets it
-      setEdits(prev => {
-        const next = { ...prev };
-        delete next[slot];
-        return next;
-      });
-      // Update config to reflect the uploaded URL
-      setConfig(prev => ({
-        ...prev,
-        [slot]: { value: data.url, source: 'admin' },
-      }));
-    } else {
-      const data = await res.json();
-      setMessage({ type: 'error', text: data.error || 'Upload failed' });
-    }
-    setUploading(null);
-  }
-
-  async function handleDeleteUpload(slot: string) {
-    setMessage(null);
-
-    const res = await apiFetch('/api/admin/branding', {
-      method: 'DELETE',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ slot }),
-    });
-
-    if (res.ok) {
-      setMessage({ type: 'success', text: 'Uploaded file removed. Reverted to default.' });
-      setEdits(prev => {
-        const next = { ...prev };
-        delete next[slot];
-        return next;
-      });
-      await fetchConfig();
-    } else {
-      const data = await res.json();
-      setMessage({ type: 'error', text: data.error || 'Failed to remove' });
-    }
-  }
-
-  async function handleRevert(key: string) {
-    const res = await apiFetch('/api/admin/config', {
-      method: 'DELETE',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ key }),
-    });
-    if (res.ok) {
-      setEdits(prev => {
-        const next = { ...prev };
-        delete next[key];
-        return next;
-      });
-      await fetchConfig();
-    }
-  }
-
-  const isUploadedFile = (key: string): boolean => {
-    const val = currentValue(key);
-    return val.startsWith('/api/admin/branding/');
-  };
-
-  const hasEdits = Object.keys(edits).length > 0;
-
-  if (loading) {
-    return <div className="flex items-center justify-center py-12 text-muted-foreground text-sm">Loading...</div>;
-  }
-
-  return (
-    <div className="space-y-6">
-      <div className="flex items-center justify-between">
-        <div>
-          <h1 className="text-2xl font-semibold text-foreground">Branding</h1>
-          <p className="text-sm text-muted-foreground mt-1">Customize logos, favicon, and company information</p>
-        </div>
-        {hasEdits && (
-          <button
-            onClick={handleSave}
-            disabled={saving}
-            className="inline-flex items-center gap-2 h-9 px-4 rounded-md bg-primary text-primary-foreground text-sm font-medium hover:bg-primary/90 disabled:opacity-50 transition-all shadow-sm"
-          >
-            {saving ? <Loader2 className="w-4 h-4 animate-spin" /> : <Save className="w-4 h-4" />}
-            Save changes
-          </button>
-        )}
-      </div>
-
-      {message && (
-        <div className={`text-sm rounded-md px-3 py-2 ${message.type === 'success' ? 'bg-emerald-50 text-emerald-700 dark:bg-emerald-950/30 dark:text-emerald-300' : 'bg-destructive/10 text-destructive'}`}>
-          {message.text}
-        </div>
-      )}
-
-      <div className="border border-border rounded-lg">
-        <div className="px-4 py-3 border-b border-border bg-muted/30">
-          <h2 className="text-sm font-medium text-foreground">Images & Logos</h2>
-          <p className="text-xs text-muted-foreground mt-0.5">Upload a file or enter a URL. Supported formats: SVG, PNG, JPEG, WebP, ICO (max 2 MB)</p>
-        </div>
-        <div className="divide-y divide-border">
-          {IMAGE_FIELDS.map(field => (
-            <div key={field.key} className="px-4 py-3">
-              <div className="flex items-center justify-between gap-4">
-                <div className="flex items-center gap-2 min-w-0">
-                  <label className="text-sm text-foreground whitespace-nowrap">{field.label}</label>
-                  {config[field.key]?.source === 'admin' && (
-                    <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">
-                      {isUploadedFile(field.key) ? 'uploaded' : 'admin'}
-                    </span>
-                  )}
-                </div>
-                <div className="flex items-center gap-2">
-                  <input
-                    type="text"
-                    value={currentValue(field.key)}
-                    onChange={(e) => handleChange(field.key, e.target.value)}
-                    placeholder="Enter URL or upload a file"
-                    className="h-8 w-64 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
-                  />
-                  <input
-                    ref={el => { fileInputRefs.current[field.key] = el; }}
-                    type="file"
-                    accept={field.accept}
-                    className="hidden"
-                    onChange={(e) => {
-                      const file = e.target.files?.[0];
-                      if (file) handleUpload(field.key, file);
-                      e.target.value = '';
-                    }}
-                  />
-                  <button
-                    onClick={() => fileInputRefs.current[field.key]?.click()}
-                    disabled={uploading === field.key}
-                    className="inline-flex items-center gap-1.5 h-8 px-2.5 rounded-md border border-input bg-background text-sm text-foreground hover:bg-muted disabled:opacity-50 transition-colors"
-                    title="Upload file"
-                  >
-                    {uploading === field.key ? <Loader2 className="w-3.5 h-3.5 animate-spin" /> : <Upload className="w-3.5 h-3.5" />}
-                  </button>
-                  {isUploadedFile(field.key) && (
-                    <button
-                      onClick={() => handleDeleteUpload(field.key)}
-                      className="text-muted-foreground hover:text-destructive transition-colors"
-                      title="Remove uploaded file"
-                    >
-                      <Trash2 className="w-3.5 h-3.5" />
-                    </button>
-                  )}
-                  {config[field.key]?.source === 'admin' && !isUploadedFile(field.key) && (
-                    <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
-                      <RotateCcw className="w-3.5 h-3.5" />
-                    </button>
-                  )}
-                </div>
-              </div>
-              {/* Preview */}
-              {currentValue(field.key) && (
-                <div className="mt-2 flex items-center gap-2">
-                  <ImageIcon className="w-3.5 h-3.5 text-muted-foreground" />
-                  <div className="h-8 w-auto bg-muted rounded flex items-center justify-center px-2">
-                    <img
-                      src={currentValue(field.key)}
-                      alt={field.label}
-                      className="max-h-6 max-w-[200px] object-contain"
-                      onError={(e) => { (e.target as HTMLImageElement).style.display = 'none'; }}
-                    />
-                  </div>
-                </div>
-              )}
-            </div>
-          ))}
-        </div>
-      </div>
-
-      <div className="border border-border rounded-lg">
-        <div className="px-4 py-3 border-b border-border bg-muted/30">
-          <h2 className="text-sm font-medium text-foreground">Company Information</h2>
-        </div>
-        <div className="divide-y divide-border">
-          {TEXT_FIELDS.map(field => (
-            <div key={field.key} className="px-4 py-3 flex items-center justify-between gap-4">
-              <div className="flex items-center gap-2 min-w-0">
-                <label className="text-sm text-foreground whitespace-nowrap">{field.label}</label>
-                {config[field.key]?.source === 'admin' && (
-                  <span className="text-[10px] font-medium uppercase tracking-wider px-1.5 py-0.5 rounded bg-primary/10 text-primary">admin</span>
-                )}
-              </div>
-              <div className="flex items-center gap-2">
-                <input
-                  type="text"
-                  value={currentValue(field.key)}
-                  onChange={(e) => handleChange(field.key, e.target.value)}
-                  placeholder={field.key.includes('Url') ? 'https://...' : 'Enter value'}
-                  className="h-8 w-72 rounded-md border border-input bg-background px-2.5 text-sm text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
-                />
-                {config[field.key]?.source === 'admin' && (
-                  <button onClick={() => handleRevert(field.key)} className="text-muted-foreground hover:text-foreground" title="Revert to default">
-                    <RotateCcw className="w-3.5 h-3.5" />
-                  </button>
-                )}
-              </div>
-            </div>
-          ))}
-        </div>
-      </div>
-    </div>
-  );
-}

app/admin/layout.tsx

@@ -1,286 +0,0 @@
-'use client';
-
-import { useEffect, useState } from 'react';
-import { useRouter, usePathname } from 'next/navigation';
-import Link from 'next/link';
-import {
-  LayoutDashboard,
-  Settings,
-  Palette,
-  Shield,
-  Scale,
-  ScrollText,
-  LogOut,
-  KeyRound,
-  Puzzle,
-  SwatchBook,
-  Mail,
-  Calendar,
-  BookUser,
-  HardDrive,
-  ArrowLeft,
-  Store,
-} from 'lucide-react';
-import { cn } from '@/lib/utils';
-import { useConfig } from '@/hooks/use-config';
-import { useThemeStore } from '@/stores/theme-store';
-import { getActiveAccountSlotHeaders } from '@/lib/auth/active-account-slot';
-
-import { useAuthStore } from '@/stores/auth-store';
-import { apiFetch } from '@/lib/browser-navigation';
-
-const NAV_GROUPS = [
-  {
-    label: 'Overview',
-    items: [
-      { href: '/admin', label: 'Dashboard', icon: LayoutDashboard },
-    ],
-  },
-  {
-    label: 'Configuration',
-    items: [
-      { href: '/admin/settings', label: 'Settings', icon: Settings },
-      { href: '/admin/branding', label: 'Branding', icon: Palette },
-      { href: '/admin/auth', label: 'Authentication', icon: Shield },
-      { href: '/admin/policy', label: 'Policy', icon: Scale },
-    ],
-  },
-  {
-    label: 'Extensions',
-    items: [
-      { href: '/admin/plugins', label: 'Plugins', icon: Puzzle },
-      { href: '/admin/themes', label: 'Themes', icon: SwatchBook },
-      { href: '/admin/marketplace', label: 'Marketplace', icon: Store },
-    ],
-  },
-  {
-    label: 'System',
-    items: [
-      { href: '/admin/logs', label: 'Audit Log', icon: ScrollText },
-    ],
-  },
-];
-
-export default function AdminLayout({ children }: { children: React.ReactNode }) {
-  const router = useRouter();
-  const pathname = usePathname();
-  const [authenticated, setAuthenticated] = useState<boolean | null>(null);
-  const [authError, setAuthError] = useState<string | null>(null);
-  const [isStalwartAdmin, setIsStalwartAdmin] = useState(false);
-  const { appLogoLightUrl, appLogoDarkUrl, loginLogoLightUrl, loginLogoDarkUrl } = useConfig();
-  const resolvedTheme = useThemeStore((s) => s.resolvedTheme);
-  const logoUrl = resolvedTheme === 'dark'
-    ? (appLogoDarkUrl || appLogoLightUrl || loginLogoDarkUrl)
-    : (appLogoLightUrl || appLogoDarkUrl || loginLogoLightUrl);
-
-  useEffect(() => {
-    if (pathname === '/admin/login') return;
-    let cancelled = false;
-
-    async function checkAuth() {
-      try {
-        const jmapHeaders = getActiveAccountSlotHeaders();
-        const res = await apiFetch('/api/admin/auth', { headers: jmapHeaders });
-        const data = await res.json();
-        if (cancelled) return;
-
-        const stalwartAdmin = data.stalwartAdmin === true;
-        setIsStalwartAdmin(stalwartAdmin);
-
-        // If neither password-based admin nor Stalwart admin, redirect away
-        if (!data.enabled && !stalwartAdmin) {
-          router.replace('/');
-          return;
-        }
-
-        if (data.authenticated) {
-          setAuthenticated(true);
-          return;
-        }
-
-        // If Stalwart admin but not yet authenticated, auto-login
-        if (stalwartAdmin) {
-          const loginRes = await apiFetch('/api/admin/auth', {
-            method: 'POST',
-            headers: { 'Content-Type': 'application/json', ...jmapHeaders },
-            body: JSON.stringify({ stalwartAuth: true }),
-          });
-          if (cancelled) return;
-          if (loginRes.ok) {
-            setAuthenticated(true);
-            return;
-          }
-          const body = await loginRes.json().catch(() => ({}));
-          setAuthError(body?.error || `Admin auto-login failed (HTTP ${loginRes.status})`);
-          setAuthenticated(false);
-          return;
-        }
-
-        router.replace('/admin/login');
-      } catch (err) {
-        if (cancelled) return;
-        setAuthError(err instanceof Error ? err.message : 'Network error during admin check');
-        setAuthenticated(false);
-      }
-    }
-
-    checkAuth();
-    return () => { cancelled = true; };
-  }, [pathname, router]);
-
-  async function handleLogout() {
-    await apiFetch('/api/admin/auth', { method: 'DELETE' });
-    router.replace('/admin/login');
-  }
-
-  // Don't gate the login page
-  if (pathname === '/admin/login') {
-    return <>{children}</>;
-  }
-
-  return (
-    <div className="min-h-screen flex bg-background">
-      {/* Slim webmail nav rail */}
-      <nav className="w-14 bg-secondary flex flex-col items-center py-3 gap-2 border-r border-border sticky top-0 h-screen shrink-0">
-        {logoUrl ? (
-          <img src={logoUrl} alt="" className="w-7 h-7 object-contain mb-2" />
-        ) : (
-          <div className="w-7 h-7 mb-2" />
-        )}
-        <a
-          href="/"
-          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
-          title="Mail"
-        >
-          <Mail className="w-[18px] h-[18px]" />
-        </a>
-        <a
-          href="/calendar"
-          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
-          title="Calendar"
-        >
-          <Calendar className="w-[18px] h-[18px]" />
-        </a>
-        <a
-          href="/contacts"
-          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
-          title="Contacts"
-        >
-          <BookUser className="w-[18px] h-[18px]" />
-        </a>
-        <a
-          href="/files"
-          className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
-          title="Files"
-        >
-          <HardDrive className="w-[18px] h-[18px]" />
-        </a>
-        <div className="mt-auto flex flex-col items-center gap-2">
-          <div className="flex items-center justify-center w-10 h-10 rounded-md bg-primary/10 text-primary" title="Admin">
-            <Shield className="w-[18px] h-[18px]" />
-          </div>
-          <a
-            href="/settings"
-            className="flex items-center justify-center w-10 h-10 rounded-md transition-colors text-muted-foreground hover:text-foreground hover:bg-muted"
-            title="Settings"
-          >
-            <Settings className="w-[18px] h-[18px]" />
-          </a>
-        </div>
-      </nav>
-
-      {/* Admin Sidebar */}
-      <aside className="w-60 border-r border-border bg-secondary flex flex-col sticky top-0 h-screen">
-        <div className="h-14 flex items-center px-4 border-b border-border shrink-0">
-          {logoUrl ? (
-            <img src={logoUrl} alt="" className="w-5 h-5 object-contain mr-2" />
-          ) : (
-            <Shield className="w-5 h-5 text-primary mr-2" />
-          )}
-          <span className="font-semibold text-sm text-foreground">Admin Panel</span>
-        </div>
-
-        <div className="flex-1 overflow-y-auto py-2">
-          <div className="px-2 space-y-0.5">
-            {NAV_GROUPS.map((group, groupIndex) => (
-              <div key={group.label}>
-                {groupIndex > 0 && <div className="mx-1 my-2 border-t border-border" />}
-                <div className="px-3 pt-2.5 pb-1">
-                  <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
-                    {group.label}
-                  </span>
-                </div>
-                {group.items.map(({ href, label, icon: Icon }) => {
-                  const active = href === '/admin' ? pathname === '/admin' : pathname.startsWith(href);
-                  return (
-                    <Link
-                      key={href}
-                      href={href}
-                      className={cn(
-                        'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
-                        active
-                          ? 'bg-accent text-accent-foreground font-medium'
-                          : 'hover:bg-muted text-foreground'
-                      )}
-                    >
-                      <Icon className={cn(
-                        'w-4 h-4 shrink-0',
-                        active ? 'text-accent-foreground' : 'text-muted-foreground'
-                      )} />
-                      {label}
-                    </Link>
-                  );
-                })}
-              </div>
-            ))}
-          </div>
-        </div>
-
-        <div className="px-2 py-2 border-t border-border space-y-0.5 shrink-0">
-          {!isStalwartAdmin && (
-            <Link
-              href="/admin/change-password"
-              className={cn(
-                'w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5',
-                pathname === '/admin/change-password'
-                  ? 'bg-accent text-accent-foreground font-medium'
-                  : 'hover:bg-muted text-foreground'
-              )}
-            >
-              <KeyRound className={cn(
-                'w-4 h-4 shrink-0',
-              pathname === '/admin/change-password' ? 'text-accent-foreground' : 'text-muted-foreground'
-            )} />
-            Change Password
-          </Link>
-          )}
-          <button
-            onClick={handleLogout}
-            className="w-full text-left px-3 py-2 rounded-md text-sm transition-colors duration-150 flex items-center gap-2.5 hover:bg-muted text-foreground"
-          >
-            <LogOut className="w-4 h-4 shrink-0 text-muted-foreground" />
-            Sign out
-          </button>
-        </div>
-      </aside>
-
-      {/* Main content */}
-      <main className="flex-1 overflow-auto">
-        <div className="max-w-4xl mx-auto p-6">
-          {authError ? (
-            <div className="rounded-lg border border-destructive/40 bg-destructive/10 p-4 text-sm text-destructive">
-              <p className="font-medium">Admin authentication failed</p>
-              <p className="mt-1 text-destructive/80">{authError}</p>
-            </div>
-          ) : authenticated === null ? (
-            <div className="py-12 text-center text-sm text-muted-foreground animate-pulse">
-              Loading admin panel…
-            </div>
-          ) : authenticated ? (
-            children
-          ) : null}
-        </div>
-      </main>
-    </div>
-  );
-}

app/api/account/stalwart/jmap/route.ts

@@ -1,6 +1,7 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+import { JmapRedirectError, fetchJmapSession, postJmap, rebaseApiUrl } from '@/lib/stalwart/jmap-api';
 
 /**
  * POST /api/account/stalwart/jmap
@@ -23,14 +24,26 @@ export async function POST(request: NextRequest) {
 
     const body = await request.text();
 
-    const response = await fetch(`${creds.serverUrl}/jmap/`, {
-      method: 'POST',
-      headers: {
-        'Authorization': creds.authHeader,
-        'Content-Type': 'application/json',
-      },
-      body,
-    });
+    const directUrl = `${creds.serverUrl}/jmap/`;
+    let response = await postJmap(directUrl, creds.authHeader, body);
+
+    if (response.status === 404) {
+      // `${serverUrl}/jmap/` is not the API endpoint on this deployment
+      // (path prefix, non-Stalwart URL layout). Resolve the session's
+      // advertised apiUrl on the same host and retry once.
+      const session = await fetchJmapSession(creds.serverUrl, creds.authHeader);
+      const apiUrl = rebaseApiUrl(session, creds.serverUrl);
+      if (apiUrl && apiUrl !== directUrl) {
+        response = await postJmap(apiUrl, creds.authHeader, body);
+      }
+    }
+
+    if (!response.ok) {
+      logger.warn('Stalwart JMAP passthrough upstream error', {
+        status: response.status,
+        serverUrl: creds.serverUrl,
+      });
+    }
 
     const responseText = await response.text();
     return new NextResponse(responseText, {
@@ -38,9 +51,27 @@ export async function POST(request: NextRequest) {
       headers: { 'Content-Type': response.headers.get('Content-Type') || 'application/json' },
     });
   } catch (error) {
+    if (error instanceof JmapRedirectError) {
+      logger.error('Stalwart JMAP passthrough redirect error', { error: error.message });
+      return NextResponse.json({ error: error.message }, { status: 502 });
+    }
+    // `fetch failed` from undici is too generic to debug — the real reason
+    // (ENOTFOUND, ECONNREFUSED, self-signed TLS, …) lives on `error.cause`.
+    const err = error as Error & { cause?: { code?: string; message?: string } };
     logger.error('Stalwart JMAP passthrough error', {
-      error: error instanceof Error ? error.message : 'Unknown',
+      error: err?.message ?? 'Unknown',
+      causeCode: err?.cause?.code,
+      causeMessage: err?.cause?.message,
     });
+    // The server this process failed to reach is the user's own mail server,
+    // so the reason is worth surfacing: an opaque 500 leaves operators with
+    // nothing to act on.
+    if (err?.cause?.code) {
+      return NextResponse.json(
+        { error: `Cannot reach the JMAP server (${err.cause.code})` },
+        { status: 502 },
+      );
+    }
     return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
   }
 }

app/api/admin/audit/route.ts

@@ -8,7 +8,7 @@ import { logger } from '@/lib/logger';
  */
 export async function GET(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const page = Math.max(1, parseInt(request.nextUrl.searchParams.get('page') || '1', 10));

app/api/admin/branding/[filename]/route.ts

@@ -1,8 +1,11 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { readFile, stat } from 'node:fs/promises';
 import path from 'node:path';
+import { getConfigDir } from '@/lib/admin/paths';
 
-const BRANDING_DIR = path.join(process.cwd(), 'data', 'admin', 'branding');
+function getBrandingDir(): string {
+  return path.join(getConfigDir(), 'branding');
+}
 
 const MIME_TYPES: Record<string, string> = {
   '.svg': 'image/svg+xml',
@@ -38,11 +41,11 @@ export async function GET(
       return NextResponse.json({ error: 'Unsupported file type' }, { status: 400 });
     }
 
-    const filePath = path.join(BRANDING_DIR, safe);
+    const filePath = path.join(getBrandingDir(), safe);
 
-    // Ensure resolved path is still within BRANDING_DIR
+    // Ensure resolved path is still within getBrandingDir()
     const resolved = path.resolve(filePath);
-    if (!resolved.startsWith(path.resolve(BRANDING_DIR))) {
+    if (!resolved.startsWith(path.resolve(getBrandingDir()))) {
       return NextResponse.json({ error: 'Invalid filename' }, { status: 400 });
     }
 
@@ -53,11 +56,19 @@ export async function GET(
 
     const buffer = await readFile(resolved);
 
+    // SVG can carry inline <script> and event handlers that execute when the
+    // file is fetched as a top-level document. Defense in depth on top of
+    // admin-only upload: nosniff blocks MIME confusion, the CSP forces a
+    // sandboxed unique origin so any script in an SVG is inert and cannot
+    // touch app cookies or storage.
     return new NextResponse(buffer, {
       headers: {
         'Content-Type': contentType,
         'Cache-Control': 'public, max-age=3600, must-revalidate',
         'Content-Length': String(buffer.length),
+        'X-Content-Type-Options': 'nosniff',
+        'Content-Security-Policy':
+          "default-src 'none'; img-src 'self' data:; style-src 'unsafe-inline'; sandbox",
       },
     });
   } catch {

app/api/admin/branding/route.ts

@@ -2,12 +2,20 @@ import { NextRequest, NextResponse } from 'next/server';
 import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
 import { auditLog } from '@/lib/admin/audit';
 import { configManager } from '@/lib/admin/config-manager';
+import { getConfigDir } from '@/lib/admin/paths';
+import {
+  parseDomainBranding,
+  type DomainBrandingEntry,
+  type BrandingOverrideKey,
+} from '@/lib/admin/domain-branding';
 import { logger } from '@/lib/logger';
-import { writeFile, unlink, mkdir } from 'node:fs/promises';
+import { writeFile, unlink, mkdir, readdir } from 'node:fs/promises';
 import { existsSync } from 'node:fs';
 import path from 'node:path';
 
-const BRANDING_DIR = path.join(process.cwd(), 'data', 'admin', 'branding');
+function getBrandingDir(): string {
+  return path.join(getConfigDir(), 'branding');
+}
 const MAX_FILE_SIZE = 2 * 1024 * 1024; // 2 MB
 const ALLOWED_MIME_TYPES = new Set([
   'image/svg+xml',
@@ -18,45 +26,127 @@ const ALLOWED_MIME_TYPES = new Set([
   'image/vnd.microsoft.icon',
 ]);
 
+type UploadSlot = BrandingOverrideKey;
+
 /** Slots that correspond to branding config keys */
-const VALID_SLOTS = new Set([
+const VALID_SLOTS = new Set<UploadSlot>([
   'faviconUrl',
+  'pwaIconUrl',
   'appLogoLightUrl',
   'appLogoDarkUrl',
   'loginLogoLightUrl',
   'loginLogoDarkUrl',
+  'pwaScreenshotMobileUrl',
+  'pwaScreenshotDesktopUrl',
 ]);
 
+const EXT_BY_MIME: Record<string, string> = {
+  'image/svg+xml': '.svg',
+  'image/png': '.png',
+  'image/jpeg': '.jpg',
+  'image/webp': '.webp',
+  'image/x-icon': '.ico',
+  'image/vnd.microsoft.icon': '.ico',
+};
+
+const POSSIBLE_EXTS = ['.svg', '.png', '.jpg', '.jpeg', '.webp', '.ico'];
+
+// Exact hostnames only (no wildcards): wildcards can't be uploaded against
+// because we'd need a real subdomain to serve the file from.
+const EXACT_HOST_RE = /^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)*$/;
+
 function sanitizeFilename(name: string): string {
   // Strip directory traversal, keep only safe chars
   return path.basename(name).replace(/[^a-zA-Z0-9._-]/g, '_');
 }
 
+function normalizeHost(raw: string): string {
+  return raw.trim().toLowerCase().replace(/\.+$/, '');
+}
+
+/** Filename used to store a per-host uploaded asset. */
+function domainAssetName(host: string, slot: BrandingOverrideKey, ext: string): string {
+  return sanitizeFilename(`domain__${host}__${slot}${ext}`);
+}
+
+/** True if the file belongs to the given host+slot (any extension). */
+function isDomainAssetFor(filename: string, host: string, slot: BrandingOverrideKey): boolean {
+  const prefix = sanitizeFilename(`domain__${host}__${slot}.`);
+  return filename.startsWith(prefix);
+}
+
+/** Merge a per-host update into the existing domainBranding array. */
+function mergeDomainEntry(
+  current: DomainBrandingEntry[],
+  host: string,
+  patch: Partial<DomainBrandingEntry>,
+): DomainBrandingEntry[] {
+  const next = current.slice();
+  const idx = next.findIndex(e => e.host === host);
+  if (idx === -1) {
+    next.push({ host, ...patch });
+  } else {
+    next[idx] = { ...next[idx], ...patch };
+  }
+  return next;
+}
+
+/** Remove keys from a host's entry. If the entry has nothing left besides
+ *  `host`, drop it entirely. */
+function clearDomainKeys(
+  current: DomainBrandingEntry[],
+  host: string,
+  keys: BrandingOverrideKey[],
+): DomainBrandingEntry[] {
+  const idx = current.findIndex(e => e.host === host);
+  if (idx === -1) return current;
+  const entry = { ...current[idx] };
+  for (const key of keys) delete (entry as Record<string, unknown>)[key];
+  const next = current.slice();
+  if (Object.keys(entry).filter(k => k !== 'host').length === 0) {
+    next.splice(idx, 1);
+  } else {
+    next[idx] = entry;
+  }
+  return next;
+}
+
 /**
  * POST /api/admin/branding - Upload a branding image file
  *
  * Expects multipart/form-data with:
  *   - file: the image file
  *   - slot: which branding field this is for (e.g. "faviconUrl")
+ *   - host (optional): when set, the upload is stored against the
+ *     per-domain entry for that hostname instead of the global default.
  */
 export async function POST(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
     const formData = await request.formData();
     const file = formData.get('file') as File | null;
     const slot = formData.get('slot') as string | null;
+    const rawHost = (formData.get('host') as string | null) ?? '';
 
     if (!file || !slot) {
       return NextResponse.json({ error: 'Missing file or slot' }, { status: 400 });
     }
 
-    if (!VALID_SLOTS.has(slot)) {
+    if (!VALID_SLOTS.has(slot as UploadSlot)) {
       return NextResponse.json({ error: `Invalid slot: ${slot}` }, { status: 400 });
     }
 
+    const host = rawHost ? normalizeHost(rawHost) : '';
+    if (host && !EXACT_HOST_RE.test(host)) {
+      return NextResponse.json(
+        { error: `Invalid host: ${rawHost} (wildcards must be configured by URL, not upload)` },
+        { status: 400 },
+      );
+    }
+
     if (file.size > MAX_FILE_SIZE) {
       return NextResponse.json({ error: 'File too large (max 2 MB)' }, { status: 400 });
     }
@@ -68,34 +158,51 @@ export async function POST(request: NextRequest) {
       );
     }
 
-    // Determine extension from mime type
-    const extMap: Record<string, string> = {
-      'image/svg+xml': '.svg',
-      'image/png': '.png',
-      'image/jpeg': '.jpg',
-      'image/webp': '.webp',
-      'image/x-icon': '.ico',
-      'image/vnd.microsoft.icon': '.ico',
-    };
-    const ext = extMap[file.type] || '.png';
-    const safeName = sanitizeFilename(`${slot}${ext}`);
-    const filePath = path.join(BRANDING_DIR, safeName);
+    const ext = EXT_BY_MIME[file.type] ?? '.png';
+    const safeName = host
+      ? domainAssetName(host, slot as BrandingOverrideKey, ext)
+      : sanitizeFilename(`${slot}${ext}`);
+    const filePath = path.join(getBrandingDir(), safeName);
 
-    // Ensure branding directory exists
-    if (!existsSync(BRANDING_DIR)) {
-      await mkdir(BRANDING_DIR, { recursive: true });
+    if (!existsSync(getBrandingDir())) {
+      await mkdir(getBrandingDir(), { recursive: true });
+    }
+
+    // Strip any prior asset for the same slot but a different extension so
+    // the directory doesn't accumulate orphan files on re-upload.
+    const dir = getBrandingDir();
+    const allFiles = await readdir(dir).catch(() => [] as string[]);
+    for (const f of allFiles) {
+      if (f === safeName) continue;
+      const isSame = host
+        ? isDomainAssetFor(f, host, slot as BrandingOverrideKey)
+        : POSSIBLE_EXTS.some(e => f === `${slot}${e}`);
+      if (isSame) {
+        try { await unlink(path.join(dir, f)); } catch { /* ignore */ }
+      }
     }
 
-    // Write file to disk
     const buffer = Buffer.from(await file.arrayBuffer());
     await writeFile(filePath, buffer);
 
-    // Update config to point to the served URL
     const servedUrl = `/api/admin/branding/${safeName}`;
     await configManager.ensureLoaded();
-    await configManager.setAdminConfig({ [slot]: servedUrl });
 
-    await auditLog('branding_upload', { slot, filename: safeName, size: file.size, mimeType: file.type }, ip);
+    if (host) {
+      const current = parseDomainBranding(configManager.get<unknown>('domainBranding', []));
+      const next = mergeDomainEntry(current, host, { [slot]: servedUrl });
+      await configManager.setAdminConfig({ domainBranding: next });
+    } else {
+      await configManager.setAdminConfig({ [slot]: servedUrl });
+    }
+
+    await auditLog('branding_upload', {
+      slot,
+      host: host || undefined,
+      filename: safeName,
+      size: file.size,
+      mimeType: file.type,
+    }, ip);
 
     return NextResponse.json({ url: servedUrl, filename: safeName });
   } catch (error) {
@@ -107,36 +214,60 @@ export async function POST(request: NextRequest) {
 /**
  * DELETE /api/admin/branding - Remove an uploaded branding file
  *
- * Expects JSON body: { slot: string }
+ * Expects JSON body: { slot: string, host?: string }
+ *
+ * When `host` is provided, only the per-domain asset for that host+slot is
+ * removed (and the override in `domainBranding[host][slot]` is cleared).
+ * Otherwise the global asset and config override are removed.
  */
 export async function DELETE(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
-    const { slot } = await request.json();
+    const body = await request.json().catch(() => ({})) as { slot?: string; host?: string };
+    const slot = body.slot;
+    const rawHost = body.host ?? '';
 
-    if (!slot || !VALID_SLOTS.has(slot)) {
+    if (!slot || !VALID_SLOTS.has(slot as UploadSlot)) {
       return NextResponse.json({ error: 'Invalid or missing slot' }, { status: 400 });
     }
 
-    // Find and remove matching files for this slot
-    const possibleExts = ['.svg', '.png', '.jpg', '.webp', '.ico'];
+    const host = rawHost ? normalizeHost(rawHost) : '';
+    if (host && !EXACT_HOST_RE.test(host)) {
+      return NextResponse.json({ error: `Invalid host: ${rawHost}` }, { status: 400 });
+    }
+
+    const dir = getBrandingDir();
     let removed = false;
-    for (const ext of possibleExts) {
-      const filePath = path.join(BRANDING_DIR, `${slot}${ext}`);
-      if (existsSync(filePath)) {
-        await unlink(filePath);
-        removed = true;
+    if (host) {
+      const allFiles = await readdir(dir).catch(() => [] as string[]);
+      for (const f of allFiles) {
+        if (isDomainAssetFor(f, host, slot as BrandingOverrideKey)) {
+          try { await unlink(path.join(dir, f)); removed = true; } catch { /* ignore */ }
+        }
+      }
+    } else {
+      for (const ext of POSSIBLE_EXTS) {
+        const filePath = path.join(dir, `${slot}${ext}`);
+        if (existsSync(filePath)) {
+          await unlink(filePath);
+          removed = true;
+        }
       }
     }
 
-    // Clear the config override so it falls back to default/env
     await configManager.ensureLoaded();
-    await configManager.removeAdminOverride(slot);
+    if (host) {
+      const current = parseDomainBranding(configManager.get<unknown>('domainBranding', []));
+      const next = clearDomainKeys(current, host, [slot as BrandingOverrideKey]);
+      await configManager.setAdminConfig({ domainBranding: next });
+    } else {
+      await configManager.removeAdminOverride(slot);
+    }
 
-    await auditLog('branding_delete', { slot, fileRemoved: removed }, ip);
+    await auditLog('branding_delete', { slot, host: host || undefined, fileRemoved: removed }, ip);
 
     return NextResponse.json({ success: true });
   } catch (error) {

app/api/admin/change-password/route.ts

@@ -9,7 +9,7 @@ import { logger } from '@/lib/logger';
  */
 export async function POST(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);

app/api/admin/config/route.ts

@@ -2,21 +2,46 @@ import { NextRequest, NextResponse } from 'next/server';
 import { configManager } from '@/lib/admin/config-manager';
 import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
 import { auditLog } from '@/lib/admin/audit';
-import { CONFIG_ENV_MAP } from '@/lib/admin/types';
+import { CONFIG_ENV_MAP, SENSITIVE_CONFIG_KEYS } from '@/lib/admin/types';
+import { parseJmapServers } from '@/lib/admin/jmap-servers';
+import { parseDomainBranding } from '@/lib/admin/domain-branding';
 import { logger } from '@/lib/logger';
 
+// Strings that count as "no real secret configured" - used so the dashboard
+// can warn about a placeholder session secret without us ever returning the
+// raw value to the client.
+const SENSITIVE_PLACEHOLDERS = new Set(['your-secret-key-here']);
+
 /**
  * GET /api/admin/config - Get full config with sources (admin-protected)
+ *
+ * Sensitive keys (sessionSecret, oauthClientSecret) are returned with
+ * `value` omitted and a `hasValue` boolean instead. An admin session is
+ * enough to read every other config knob; the secrets themselves stay on
+ * the server so that an XSS or session-theft can't lift them in one
+ * request and forge admin/user session cookies offline.
  */
-export async function GET() {
+export async function GET(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     await configManager.ensureLoaded();
     const config = configManager.getAllWithSources();
 
-    return NextResponse.json(config, {
+    const safe: Record<string, { value?: unknown; source: 'admin' | 'env' | 'default'; hasValue?: boolean }> = {};
+    for (const [key, entry] of Object.entries(config)) {
+      if (SENSITIVE_CONFIG_KEYS.has(key)) {
+        const v = entry.value;
+        const hasValue =
+          typeof v === 'string' && v.length > 0 && !SENSITIVE_PLACEHOLDERS.has(v);
+        safe[key] = { source: entry.source, hasValue };
+      } else {
+        safe[key] = entry;
+      }
+    }
+
+    return NextResponse.json(safe, {
       headers: { 'Cache-Control': 'no-store' },
     });
   } catch (error) {
@@ -30,7 +55,7 @@ export async function GET() {
  */
 export async function PATCH(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -47,6 +72,42 @@ export async function PATCH(request: NextRequest) {
       return NextResponse.json({ error: `Unknown config keys: ${invalidKeys.join(', ')}` }, { status: 400 });
     }
 
+    // Normalize jmapServers: pass through the parser so invalid entries are
+    // rejected (bad ids, duplicate ids, non-HTTP URLs) before they're persisted.
+    if ('jmapServers' in updates) {
+      const incoming = updates.jmapServers;
+      if (incoming != null && !Array.isArray(incoming)) {
+        return NextResponse.json({ error: 'jmapServers must be an array' }, { status: 400 });
+      }
+      const sanitized = parseJmapServers(incoming);
+      const incomingCount = Array.isArray(incoming) ? incoming.length : 0;
+      if (sanitized.length !== incomingCount) {
+        return NextResponse.json({
+          error: 'One or more jmapServers entries are invalid (each needs a unique id, label, and HTTP(S) url).',
+        }, { status: 400 });
+      }
+      updates.jmapServers = sanitized;
+    }
+
+    // Normalize domainBranding: drop entries with an invalid/missing host or
+    // duplicate hosts before persisting. Each entry's branding field strings
+    // are passed through unchanged (URL/string content is the operator's
+    // responsibility, same as the flat branding fields).
+    if ('domainBranding' in updates) {
+      const incoming = updates.domainBranding;
+      if (incoming != null && !Array.isArray(incoming)) {
+        return NextResponse.json({ error: 'domainBranding must be an array' }, { status: 400 });
+      }
+      const sanitized = parseDomainBranding(incoming);
+      const incomingCount = Array.isArray(incoming) ? incoming.length : 0;
+      if (sanitized.length !== incomingCount) {
+        return NextResponse.json({
+          error: 'One or more domainBranding entries are invalid (each needs a unique, valid host).',
+        }, { status: 400 });
+      }
+      updates.domainBranding = sanitized;
+    }
+
     // Get old values for audit
     const oldValues: Record<string, unknown> = {};
     for (const key of Object.keys(updates)) {
@@ -68,7 +129,7 @@ export async function PATCH(request: NextRequest) {
  */
 export async function DELETE(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);

app/api/admin/marketplace/[slug]/route.ts

@@ -0,0 +1,229 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { logger } from '@/lib/logger';
+import {
+  getPluginRegistry,
+  getThemeRegistry,
+} from '@/lib/admin/plugin-registry';
+import JSZip from 'jszip';
+import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE } from '@/lib/plugin-types';
+import { configManager } from '@/lib/admin/config-manager';
+
+async function getDirectoryUrl(): Promise<string> {
+  await configManager.ensureLoaded();
+  return configManager.get<string>('extensionDirectoryUrl') || 'https://extensions.bulwarkmail.org';
+}
+
+const MAX_PREVIEW_SOURCE_LEN = 100_000;
+
+/**
+ * GET /api/admin/marketplace/[slug]
+ * Returns full preview info for an extension: directory metadata,
+ * the bundle's manifest, a (truncated) source preview, and install status.
+ * Lets admins audit what they're about to install before pressing the button.
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: Promise<{ slug: string }> },
+) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+
+    const { slug } = await params;
+    const directoryUrl = await getDirectoryUrl();
+
+    // 1. Extension metadata + screenshots + theme previews from the directory
+    const detailUrl = new URL(`/api/v1/extension/${encodeURIComponent(slug)}`, directoryUrl);
+    const detailRes = await fetch(detailUrl.toString(), {
+      headers: { Accept: 'application/json' },
+      signal: AbortSignal.timeout(10000),
+    });
+
+    if (!detailRes.ok) {
+      const status = detailRes.status === 404 ? 404 : 502;
+      return NextResponse.json(
+        { error: status === 404 ? 'Extension not found' : 'Directory request failed' },
+        { status },
+      );
+    }
+
+    const detailJson = await detailRes.json();
+    const extension = detailJson.data as Record<string, unknown> | undefined;
+    if (!extension) {
+      return NextResponse.json({ error: 'Extension not found' }, { status: 404 });
+    }
+
+    const type = extension.type as 'plugin' | 'theme';
+    const latestVersion = (extension.latestVersion as { version?: string } | null)?.version
+      ?? null;
+
+    // 2. Pull the bundle so we can show what's actually inside.
+    let manifest: Record<string, unknown> | null = null;
+    let sourcePreview: { name: string; content: string; truncated: boolean } | null = null;
+    let bundleError: string | null = null;
+    let bundleSize = 0;
+
+    if (latestVersion) {
+      try {
+        const bundleUrl = new URL(
+          `/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(latestVersion)}`,
+          directoryUrl,
+        );
+        const bundleRes = await fetch(bundleUrl.toString(), {
+          signal: AbortSignal.timeout(30000),
+        });
+
+        if (!bundleRes.ok) {
+          bundleError = `Bundle download failed (${bundleRes.status})`;
+        } else {
+          const buffer = await bundleRes.arrayBuffer();
+          bundleSize = buffer.byteLength;
+          const maxSize = type === 'theme' ? MAX_THEME_SIZE : MAX_PLUGIN_SIZE;
+          if (buffer.byteLength > maxSize) {
+            bundleError = `Bundle exceeds ${type === 'theme' ? '1 MB' : '5 MB'} size limit`;
+          } else {
+            const zip = await JSZip.loadAsync(buffer);
+
+            // Detect optional root directory inside the ZIP.
+            const entries = Object.keys(zip.files);
+            const topDirs = new Set(entries.map((e) => e.split('/')[0]));
+            let root = '';
+            if (topDirs.size === 1) {
+              const dir = [...topDirs][0];
+              if (zip.files[dir + '/'] || entries.some((e) => e.startsWith(dir + '/'))) {
+                root = dir + '/';
+              }
+            }
+
+            const manifestFile = zip.file(root + 'manifest.json');
+            if (!manifestFile) {
+              bundleError = 'Bundle missing manifest.json';
+            } else {
+              try {
+                manifest = JSON.parse(await manifestFile.async('string'));
+              } catch {
+                bundleError = 'Invalid manifest.json in bundle';
+              }
+            }
+
+            if (manifest) {
+              if (type === 'theme') {
+                const cssFile = zip.file(root + 'theme.css');
+                if (cssFile) {
+                  const css = await cssFile.async('string');
+                  sourcePreview = {
+                    name: 'theme.css',
+                    content: css.length > MAX_PREVIEW_SOURCE_LEN
+                      ? css.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : css,
+                    truncated: css.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              } else {
+                const entrypoint = (manifest.entrypoint as string) || 'index.js';
+                const jsFile = zip.file(root + entrypoint);
+                if (jsFile) {
+                  const code = await jsFile.async('string');
+                  sourcePreview = {
+                    name: entrypoint,
+                    content: code.length > MAX_PREVIEW_SOURCE_LEN
+                      ? code.slice(0, MAX_PREVIEW_SOURCE_LEN)
+                      : code,
+                    truncated: code.length > MAX_PREVIEW_SOURCE_LEN,
+                  };
+                }
+              }
+            }
+          }
+        }
+      } catch (err) {
+        bundleError = err instanceof Error ? err.message : 'Failed to read bundle';
+      }
+    } else {
+      bundleError = 'Extension has no published version';
+    }
+
+    // 3. Install status (slug is used as the registry id at install time)
+    const [pluginRegistry, themeRegistry] = await Promise.all([
+      getPluginRegistry(),
+      getThemeRegistry(),
+    ]);
+    const installedEntry = type === 'theme'
+      ? themeRegistry.themes.find((t) => t.id === slug)
+      : pluginRegistry.plugins.find((p) => p.id === slug);
+    const installed = installedEntry !== undefined;
+    const installedVersion = installedEntry?.version ?? null;
+
+    // 4. Build screenshot URLs (proxy through the directory's public files endpoint).
+    const screenshots = Array.isArray(extension.screenshots)
+      ? (extension.screenshots as Array<{ path: string; altText?: string | null }>).map((s) => ({
+          url: new URL(`/api/v1/files/${s.path}`, directoryUrl).toString(),
+          altText: s.altText ?? null,
+        }))
+      : [];
+
+    // Strip the heavy `manifest` blob from versions when echoing the directory data.
+    const versions = Array.isArray(extension.versions)
+      ? (extension.versions as Array<Record<string, unknown>>).map((v) => ({
+          version: v.version,
+          changelog: v.changelog,
+          bundleSize: v.bundleSize,
+          minAppVersion: v.minAppVersion,
+          publishedAt: v.publishedAt,
+          permissions: v.permissions,
+        }))
+      : [];
+
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, directoryUrl).toString()
+        : null;
+
+    return NextResponse.json(
+      {
+        extension: {
+          slug: extension.slug,
+          name: extension.name,
+          type: extension.type,
+          pluginType: extension.pluginType ?? null,
+          description: extension.description,
+          longDescription: extension.longDescription ?? null,
+          tags: extension.tags ?? [],
+          permissions: extension.permissions ?? [],
+          totalDownloads: extension.totalDownloads ?? 0,
+          featured: extension.featured ?? false,
+          githubRepo: extension.githubRepo ?? null,
+          license: extension.license ?? null,
+          minAppVersion: extension.minAppVersion ?? null,
+          iconUrl: fileUrl(extension.iconPath),
+          bannerUrl: fileUrl(extension.bannerPath),
+          author: extension.author ?? null,
+          latestVersion,
+          versions,
+          screenshots,
+          themePreviews: extension.themePreviews ?? [],
+          createdAt: extension.createdAt ?? null,
+          updatedAt: extension.updatedAt ?? null,
+        },
+        bundle: {
+          manifest,
+          source: sourcePreview,
+          size: bundleSize,
+          error: bundleError,
+        },
+        installed,
+        installedVersion,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (error) {
+    logger.error('Marketplace preview error', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return NextResponse.json(
+      { error: 'Failed to load preview' },
+      { status: 502 },
+    );
+  }
+}

app/api/admin/marketplace/route.ts

@@ -5,6 +5,8 @@ import { logger } from '@/lib/logger';
 import {
   savePlugin,
   saveTheme,
+  getPlugin,
+  getTheme,
   getPluginRegistry,
   getThemeRegistry,
   type ServerPlugin,
@@ -12,13 +14,19 @@ import {
 } from '@/lib/admin/plugin-registry';
 import {
   sanitizeFrameOrigins,
+  sanitizeHttpOrigins,
+  sanitizeApiPostPaths,
   invalidateFrameOriginsCache,
 } from '@/lib/admin/csp-frame-origins';
 import JSZip from 'jszip';
-import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE, ALL_PERMISSIONS, ALLOWED_PLUGIN_FILES } from '@/lib/plugin-types';
+import { MAX_PLUGIN_SIZE, MAX_THEME_SIZE, ALL_PERMISSIONS } from '@/lib/plugin-types';
 import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
+import { configManager } from '@/lib/admin/config-manager';
 
-const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'http://localhost:3001';
+async function getDirectoryUrl(): Promise<string> {
+  await configManager.ensureLoaded();
+  return configManager.get<string>('extensionDirectoryUrl') || 'https://extensions.bulwarkmail.org';
+}
 
 /**
  * GET /api/admin/marketplace - Search/browse the extension directory
@@ -26,11 +34,12 @@ const DIRECTORY_URL = process.env.EXTENSION_DIRECTORY_URL || 'http://localhost:3
  */
 export async function GET(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
+    const directoryUrl = await getDirectoryUrl();
     const { searchParams } = request.nextUrl;
-    const url = new URL('/api/v1/extensions', DIRECTORY_URL);
+    const url = new URL('/api/v1/extensions', directoryUrl);
 
     // Forward all search params
     for (const [key, value] of searchParams.entries()) {
@@ -57,16 +66,32 @@ export async function GET(request: NextRequest) {
       getThemeRegistry(),
     ]);
 
-    const installedPlugins = new Set(pluginRegistry.plugins.map(p => p.id));
-    const installedThemes = new Set(themeRegistry.themes.map(t => t.id));
+    const installedPluginVersions = new Map(
+      pluginRegistry.plugins.map(p => [p.id, p.version] as const),
+    );
+    const installedThemeVersions = new Map(
+      themeRegistry.themes.map(t => [t.id, t.version] as const),
+    );
+
+    const fileUrl = (path: unknown): string | null =>
+      typeof path === 'string' && path
+        ? new URL(`/api/v1/files/${path}`, directoryUrl).toString()
+        : null;
 
     if (data.data) {
-      data.data = data.data.map((ext: Record<string, unknown>) => ({
-        ...ext,
-        installed: ext.type === 'theme'
-          ? installedThemes.has(ext.slug as string)
-          : installedPlugins.has(ext.slug as string),
-      }));
+      data.data = data.data.map((ext: Record<string, unknown>) => {
+        const slug = ext.slug as string;
+        const installedVersion = ext.type === 'theme'
+          ? installedThemeVersions.get(slug) ?? null
+          : installedPluginVersions.get(slug) ?? null;
+        return {
+          ...ext,
+          iconUrl: fileUrl(ext.iconPath),
+          bannerUrl: fileUrl(ext.bannerPath),
+          installed: installedVersion !== null,
+          installedVersion,
+        };
+      });
     }
 
     return NextResponse.json(data, {
@@ -84,7 +109,7 @@ export async function GET(request: NextRequest) {
  */
 export async function POST(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -99,7 +124,8 @@ export async function POST(request: NextRequest) {
     }
 
     // Download the bundle from the directory
-    const bundleUrl = new URL(`/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(version)}`, DIRECTORY_URL);
+    const directoryUrl = await getDirectoryUrl();
+    const bundleUrl = new URL(`/api/v1/bundle/${encodeURIComponent(slug)}/${encodeURIComponent(version)}`, directoryUrl);
     const bundleRes = await fetch(bundleUrl.toString(), {
       signal: AbortSignal.timeout(30000),
     });
@@ -155,6 +181,18 @@ export async function POST(request: NextRequest) {
 
     const now = new Date().toISOString();
 
+    // Resolve and strictly validate the id used as a filename. Marketplace
+    // bundles are authored by a third-party publisher; without this an id
+    // like "../../foo" causes savePlugin/saveTheme to write outside the
+    // plugins/themes dir via path.join.
+    const resolvedId = typeof manifest.id === 'string' && manifest.id ? manifest.id : slug;
+    if (typeof resolvedId !== 'string' || !/^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(resolvedId)) {
+      return NextResponse.json(
+        { error: 'Invalid id: must be lowercase alphanumeric with hyphens, min 2 chars' },
+        { status: 400 },
+      );
+    }
+
     if (type === 'theme') {
       // Read theme.css
       const cssFile = zip.file(root + 'theme.css');
@@ -173,22 +211,43 @@ export async function POST(request: NextRequest) {
         warnings.push(...sanitized.warnings);
       }
 
+      const existingTheme = await getTheme(resolvedId);
+      const isUpdate = existingTheme !== null;
+
       const theme: ServerTheme = {
-        id: (manifest.id as string) || slug,
+        id: resolvedId,
         name: (manifest.name as string) || slug,
-        version: (manifest.version as string) || version,
+        // Prefer the directory-published version (what we requested) over
+        // manifest.version. Publishers sometimes forget to bump the version
+        // inside the bundle's manifest.json; trusting it would make the
+        // update never appear to "stick" — the registry would keep showing
+        // the older version even after a successful update.
+        version: version || (manifest.version as string),
         author: (manifest.author as string) || 'Unknown',
         description: (manifest.description as string) || '',
         variants: (manifest.variants as string[]) || ['light', 'dark'],
-        enabled: true,
-        installedAt: now,
+        enabled: existingTheme?.enabled ?? true,
+        ...(existingTheme?.forceEnabled !== undefined
+          ? { forceEnabled: existingTheme.forceEnabled }
+          : {}),
+        installedAt: existingTheme?.installedAt ?? now,
         updatedAt: now,
       };
 
       await saveTheme(theme, css);
-      await auditLog('marketplace.install_theme', { id: theme.id, name: theme.name, version: theme.version, slug }, ip);
+      await auditLog(
+        isUpdate ? 'marketplace.update_theme' : 'marketplace.install_theme',
+        {
+          id: theme.id,
+          name: theme.name,
+          version: theme.version,
+          slug,
+          ...(isUpdate ? { previousVersion: existingTheme.version } : {}),
+        },
+        ip,
+      );
 
-      return NextResponse.json({ success: true, theme, warnings });
+      return NextResponse.json({ success: true, theme, warnings, updated: isUpdate });
     } else {
       // Plugin installation
       // Read entrypoint JS
@@ -232,7 +291,7 @@ export async function POST(request: NextRequest) {
 
       // Plugins may declare iframe origins they need for embedded content.
       // Anything that doesn't pass strict origin validation is silently
-      // dropped — the plugin still installs, but those origins are not
+      // dropped - the plugin still installs, but those origins are not
       // added to the host CSP.
       const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
       const droppedFrameOrigins = Array.isArray(manifest.frameOrigins)
@@ -246,28 +305,86 @@ export async function POST(request: NextRequest) {
         );
       }
 
+      const declaredHttpOrigins = sanitizeHttpOrigins(manifest.httpOrigins);
+      const droppedHttpOrigins = Array.isArray(manifest.httpOrigins)
+        ? (manifest.httpOrigins as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredHttpOrigins.includes(v),
+          )
+        : [];
+      if (droppedHttpOrigins.length > 0) {
+        warnings.push(
+          `Ignored invalid httpOrigins: ${droppedHttpOrigins.join(', ')}`,
+        );
+      }
+
+      const declaredApiPostPaths = sanitizeApiPostPaths(manifest.apiPostPaths);
+      const droppedApiPostPaths = Array.isArray(manifest.apiPostPaths)
+        ? (manifest.apiPostPaths as unknown[]).filter(
+            (v) => typeof v !== 'string' || !declaredApiPostPaths.includes(v),
+          )
+        : [];
+      if (droppedApiPostPaths.length > 0) {
+        warnings.push(
+          `Ignored invalid apiPostPaths: ${droppedApiPostPaths.join(', ')}`,
+        );
+      }
+
+      const existingPlugin = await getPlugin(resolvedId);
+      const isUpdate = existingPlugin !== null;
+
       const plugin: ServerPlugin = {
-        id: (manifest.id as string) || slug,
+        id: resolvedId,
         name: (manifest.name as string) || slug,
-        version: (manifest.version as string) || version,
+        // See theme branch: trust the directory-published version, not
+        // manifest.version, so updates actually stick in the registry.
+        version: version || (manifest.version as string),
         author: (manifest.author as string) || 'Unknown',
         description: (manifest.description as string) || '',
         type: (manifest.type as string) || 'hook',
+        ...(manifest.tier === 'privileged' ? { tier: 'privileged' } : {}),
         permissions,
         entrypoint,
-        enabled: true,
-        installedAt: now,
+        enabled: existingPlugin?.enabled ?? true,
+        ...(existingPlugin?.forceEnabled !== undefined
+          ? { forceEnabled: existingPlugin.forceEnabled }
+          : {}),
+        installedAt: existingPlugin?.installedAt ?? now,
         updatedAt: now,
+        ...(manifest.configSchema && typeof manifest.configSchema === 'object'
+          ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
+          : {}),
+        ...(manifest.settingsSchema && typeof manifest.settingsSchema === 'object'
+          ? { settingsSchema: manifest.settingsSchema as ServerPlugin['settingsSchema'] }
+          : {}),
         ...(declaredFrameOrigins.length > 0
           ? { frameOrigins: declaredFrameOrigins }
           : {}),
+        ...(declaredHttpOrigins.length > 0
+          ? { httpOrigins: declaredHttpOrigins }
+          : {}),
+        ...(declaredApiPostPaths.length > 0
+          ? { apiPostPaths: declaredApiPostPaths }
+          : {}),
       };
 
       await savePlugin(plugin, code);
       invalidateFrameOriginsCache();
-      await auditLog('marketplace.install_plugin', { id: plugin.id, name: plugin.name, version: plugin.version, slug, frameOrigins: declaredFrameOrigins }, ip);
+      await auditLog(
+        isUpdate ? 'marketplace.update_plugin' : 'marketplace.install_plugin',
+        {
+          id: plugin.id,
+          name: plugin.name,
+          version: plugin.version,
+          slug,
+          frameOrigins: declaredFrameOrigins,
+          httpOrigins: declaredHttpOrigins,
+          apiPostPaths: declaredApiPostPaths,
+          ...(isUpdate ? { previousVersion: existingPlugin.version } : {}),
+        },
+        ip,
+      );
 
-      return NextResponse.json({ success: true, plugin, warnings });
+      return NextResponse.json({ success: true, plugin, warnings, updated: isUpdate });
     }
   } catch (error) {
     logger.error('Marketplace install error', { error: error instanceof Error ? error.message : 'Unknown error' });

app/api/admin/oauth/setup/route.ts

@@ -84,7 +84,7 @@ function isValidOriginUrl(value: string): boolean {
 
 export async function POST(request: NextRequest) {
   try {
-    const auth = await requireAdminAuth();
+    const auth = await requireAdminAuth(request);
     if ('error' in auth) return auth.error;
 
     const ip = getClientIP(request);
@@ -139,7 +139,7 @@ export async function POST(request: NextRequest) {
     const queryEntry = queryRes.methodResponses?.[0];
     if (!queryEntry || queryEntry[0] === 'error') {
       return NextResponse.json({
-        error: 'Stalwart denied OAuthClient/query — your Stalwart account likely lacks admin permissions.',
+        error: 'Stalwart denied OAuthClient/query - your Stalwart account likely lacks admin permissions.',
         detail: queryEntry?.[1],
       }, { status: 403 });
     }
@@ -187,7 +187,7 @@ export async function POST(request: NextRequest) {
     const setEntry = setRes.methodResponses?.[0];
     if (!setEntry || setEntry[0] === 'error') {
       return NextResponse.json({
-        error: 'Stalwart denied OAuthClient/set — admin permissions required.',
+        error: 'Stalwart denied OAuthClient/set - admin permissions required.',
         detail: setEntry?.[1],
       }, { status: 403 });
     }

app/api/admin/plugin-approvals/route.ts

@@ -0,0 +1,85 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import { listApprovals, decideApproval, revokeApproval } from '@/lib/admin/plugin-approvals';
+
+/**
+ * Admin-protected CRUD for the per-(pluginId, bundleHash) approval table.
+ *
+ *   GET    /api/admin/plugin-approvals               → list all entries
+ *   POST   /api/admin/plugin-approvals               → { pluginId, bundleHash, decision: 'approved'|'denied' }
+ *   DELETE /api/admin/plugin-approvals?pluginId=…&bundleHash=…   → revoke
+ */
+
+function isValidId(s: unknown): s is string {
+  return typeof s === 'string' && /^[a-z0-9][a-z0-9-]*[a-z0-9]$/.test(s) && s.length <= 64;
+}
+function isValidHash(s: unknown): s is string {
+  return typeof s === 'string' && /^[a-f0-9]{16,128}$/i.test(s);
+}
+
+export async function GET(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    const entries = await listApprovals();
+    return NextResponse.json({ entries }, { headers: { 'Cache-Control': 'no-store' } });
+  } catch (err) {
+    logger.error('plugin-approvals GET', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    // AdminSessionPayload carries only role/iat/exp; we use a stable label
+    // for the audit trail rather than a per-user identity.
+    const adminUser = 'admin';
+    void result;
+    const ip = getClientIP(request);
+
+    let body: unknown;
+    try { body = await request.json(); } catch { body = null; }
+    const b = (body ?? {}) as { pluginId?: unknown; bundleHash?: unknown; decision?: unknown };
+    if (!isValidId(b.pluginId) || !isValidHash(b.bundleHash)) {
+      return NextResponse.json({ error: 'invalid pluginId or bundleHash' }, { status: 400 });
+    }
+    if (b.decision !== 'approved' && b.decision !== 'denied') {
+      return NextResponse.json({ error: 'decision must be "approved" or "denied"' }, { status: 400 });
+    }
+
+    const entry = await decideApproval(b.pluginId, b.bundleHash, b.decision, adminUser);
+    await auditLog('plugin.approval', { pluginId: entry.pluginId, bundleHash: entry.bundleHash, decision: entry.status }, ip);
+    return NextResponse.json({ entry });
+  } catch (err) {
+    logger.error('plugin-approvals POST', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+export async function DELETE(request: NextRequest) {
+  try {
+    const result = await requireAdminAuth(request);
+    if ('error' in result) return result.error;
+    // AdminSessionPayload carries only role/iat/exp; we use a stable label
+    // for the audit trail rather than a per-user identity.
+    const adminUser = 'admin';
+    void result;
+    const ip = getClientIP(request);
+
+    const pluginId = request.nextUrl.searchParams.get('pluginId');
+    const bundleHash = request.nextUrl.searchParams.get('bundleHash');
+    if (!isValidId(pluginId) || !isValidHash(bundleHash)) {
+      return NextResponse.json({ error: 'invalid pluginId or bundleHash' }, { status: 400 });
+    }
+    await revokeApproval(pluginId, bundleHash);
+    await auditLog('plugin.approval.revoke', { pluginId, bundleHash, by: adminUser }, ip);
+    return NextResponse.json({ ok: true });
+  } catch (err) {
+    logger.error('plugin-approvals DELETE', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/plugins/[id]/bundle/route.ts

@@ -1,5 +1,11 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getPluginBundle, getPlugin } from '@/lib/admin/plugin-registry';
+import { getDevPlugin, readDevBundle } from '@/lib/admin/plugin-dev';
+import { signBytes } from '@/lib/admin/plugin-signing';
+
+async function safeSign(code: string): Promise<string | null> {
+  try { return await signBytes(code); } catch { return null; }
+}
 
 /**
  * GET /api/admin/plugins/[id]/bundle - Serve plugin JS bundle
@@ -8,7 +14,7 @@ import { getPluginBundle, getPlugin } from '@/lib/admin/plugin-registry';
  * Only serves plugins that exist in the registry and are enabled.
  */
 export async function GET(
-  _request: NextRequest,
+  request: NextRequest,
   { params }: { params: Promise<{ id: string }> },
 ) {
   try {
@@ -19,6 +25,22 @@ export async function GET(
       return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
     }
 
+    // Dev plugins are read (and optionally bundled) straight from disk and
+    // served with no caching so every refresh picks up the latest source.
+    const devEntry = await getDevPlugin(id);
+    if (devEntry) {
+      const code = await readDevBundle(devEntry);
+      const signature = await safeSign(code);
+      const headers: Record<string, string> = {
+        'Content-Type': 'application/javascript; charset=utf-8',
+        'Cache-Control': 'no-store',
+        'ETag': `"${devEntry.plugin.bundleHash}"`,
+        'Content-Length': String(Buffer.byteLength(code, 'utf-8')),
+      };
+      if (signature) headers['X-Bundle-Signature'] = signature;
+      return new NextResponse(code, { headers });
+    }
+
     const plugin = await getPlugin(id);
     if (!plugin) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
@@ -33,13 +55,25 @@ export async function GET(
       return NextResponse.json({ error: 'Bundle not found' }, { status: 404 });
     }
 
-    return new NextResponse(code, {
-      headers: {
-        'Content-Type': 'application/javascript; charset=utf-8',
-        'Cache-Control': 'public, max-age=3600, must-revalidate',
-        'Content-Length': String(Buffer.byteLength(code, 'utf-8')),
-      },
-    });
+    // Use the registry's bundleHash as the ETag so the browser can revalidate
+    // cheaply. Cache-Control: no-cache forces revalidation on every request,
+    // but a matching If-None-Match returns 304 with no body.
+    const etag = plugin.bundleHash ? `"${plugin.bundleHash}"` : undefined;
+    const headers: Record<string, string> = {
+      'Content-Type': 'application/javascript; charset=utf-8',
+      'Cache-Control': 'private, no-cache, must-revalidate',
+    };
+    if (etag) headers['ETag'] = etag;
+
+    const signature = await safeSign(code);
+    if (signature) headers['X-Bundle-Signature'] = signature;
+
+    if (etag && request.headers.get('if-none-match') === etag) {
+      return new NextResponse(null, { status: 304, headers });
+    }
+
+    headers['Content-Length'] = String(Buffer.byteLength(code, 'utf-8'));
+    return new NextResponse(code, { headers });
   } catch {
     return NextResponse.json({ error: 'Not found' }, { status: 404 });
   }

app/api/admin/plugins/[id]/config/route.ts

@@ -1,16 +1,30 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getPlugin } from '@/lib/admin/plugin-registry';
+import { getDevPlugin } from '@/lib/admin/plugin-dev';
 import { getPluginConfig, setPluginConfig, deletePluginConfigKey } from '@/lib/admin/plugin-config';
 import { requireAdminAuth } from '@/lib/admin/session';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+
+/** Resolve a plugin from the persisted registry first, then PLUGIN_DEV_DIR. */
+async function resolvePlugin(id: string) {
+  const registered = await getPlugin(id);
+  if (registered) return registered;
+  const dev = await getDevPlugin(id);
+  return dev?.plugin ?? null;
+}
 
 /**
- * GET /api/admin/plugins/[id]/config - Read all config for a plugin
+ * GET /api/admin/plugins/[id]/config - Read plugin config
  *
- * Returns the full config object for admin-configured plugin settings.
- * This endpoint is accessible from the client-side plugin API.
+ * - Admin sessions receive every field, including those declared
+ *   `type: 'secret'` in the plugin's configSchema.
+ * - Authenticated mailbox users (the plugin running in their browser)
+ *   receive only non-secret fields.
+ * - Anonymous callers are rejected so unauthenticated visitors cannot
+ *   enumerate plugin secrets.
  */
 export async function GET(
-  _request: NextRequest,
+  request: NextRequest,
   { params }: { params: Promise<{ id: string }> },
 ) {
   try {
@@ -20,13 +34,39 @@ export async function GET(
       return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
     }
 
-    const plugin = await getPlugin(id);
+    const adminAuth = await requireAdminAuth(request);
+    const isAdmin = !('error' in adminAuth);
+
+    if (!isAdmin) {
+      const creds = await getStalwartCredentials(request);
+      if (!creds) {
+        return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+      }
+    }
+
+    const plugin = await resolvePlugin(id);
     if (!plugin) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
     }
 
     const config = await getPluginConfig(id);
-    return NextResponse.json(config, {
+
+    let response: Record<string, unknown>;
+    if (isAdmin) {
+      response = config;
+    } else {
+      response = {};
+      const schema = plugin.configSchema;
+      if (schema) {
+        for (const [key, value] of Object.entries(config)) {
+          const field = schema[key];
+          if (!field || field.type === 'secret') continue;
+          response[key] = value;
+        }
+      }
+    }
+
+    return NextResponse.json(response, {
       headers: { 'Cache-Control': 'no-store' },
     });
   } catch {
@@ -45,7 +85,7 @@ export async function PUT(
   { params }: { params: Promise<{ id: string }> },
 ) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const { id } = await params;
@@ -54,7 +94,7 @@ export async function PUT(
       return NextResponse.json({ error: 'Invalid plugin ID' }, { status: 400 });
     }
 
-    const plugin = await getPlugin(id);
+    const plugin = await resolvePlugin(id);
     if (!plugin) {
       return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
     }
@@ -75,6 +115,13 @@ export async function PUT(
       return NextResponse.json({ error: 'Invalid key format' }, { status: 400 });
     }
 
+    if (plugin.configSchema && !plugin.configSchema[body.key]) {
+      return NextResponse.json(
+        { error: 'Key is not declared in the plugin configSchema' },
+        { status: 400 },
+      );
+    }
+
     await setPluginConfig(id, body.key, body.value);
     return NextResponse.json({ ok: true });
   } catch {
@@ -92,7 +139,7 @@ export async function DELETE(
   { params }: { params: Promise<{ id: string }> },
 ) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const { id } = await params;

app/api/admin/plugins/route.ts

@@ -8,8 +8,11 @@ import {
   deletePlugin as removePlugin,
   type ServerPlugin,
 } from '@/lib/admin/plugin-registry';
+import { listDevPlugins } from '@/lib/admin/plugin-dev';
 import {
   sanitizeFrameOrigins,
+  sanitizeHttpOrigins,
+  sanitizeApiPostPaths,
   invalidateFrameOriginsCache,
 } from '@/lib/admin/csp-frame-origins';
 
@@ -29,13 +32,25 @@ const SUSPICIOUS_JS_PATTERNS = [
 /**
  * GET /api/admin/plugins - List all admin-managed plugins
  */
-export async function GET() {
+export async function GET(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
-    const registry = await getPluginRegistry();
-    return NextResponse.json(registry.plugins, {
+    const [registry, devEntries] = await Promise.all([
+      getPluginRegistry(),
+      listDevPlugins(),
+    ]);
+
+    // Dev plugins win on id collision so admins see what users actually load.
+    const devIds = new Set(devEntries.map(e => e.plugin.id));
+    const merged = [
+      ...devEntries.map(e => ({ ...e.plugin, dev: true as const })),
+      ...registry.plugins
+        .filter(p => !devIds.has(p.id))
+        .map(p => ({ ...p, dev: false as const })),
+    ];
+    return NextResponse.json(merged, {
       headers: { 'Cache-Control': 'no-store' },
     });
   } catch (error) {
@@ -49,7 +64,7 @@ export async function GET() {
  */
 export async function POST(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -143,20 +158,54 @@ export async function POST(request: NextRequest) {
     }
     const code = await entryFile.async('string');
 
-    // Security: block plugins containing dangerous JS patterns
-    const warnings: string[] = [];
-    for (const { pattern, label } of SUSPICIOUS_JS_PATTERNS) {
-      if (pattern.test(code)) warnings.push(`Contains ${label}`);
-      pattern.lastIndex = 0;
+    // Security: scan for dangerous JS patterns across EVERY script in the
+    // bundle, not just the entrypoint - a second .js file was previously never
+    // looked at.
+    //
+    // The result is a reviewable finding rather than an unconditional reject.
+    // Minified crypto libraries (openpgp.js, pkijs) legitimately contain these
+    // patterns, so a hard block makes S/MIME and PGP plugins uninstallable.
+    // This route is already admin-authenticated, so the scan is defence in
+    // depth against an accidental or compromised upload, not a trust boundary:
+    // an admin may proceed with `overrideWarnings`, and the override is
+    // recorded in the audit log with the exact findings.
+    const findings: Array<{ file: string; patterns: string[] }> = [];
+    for (const [filePath, entry] of Object.entries(zip.files)) {
+      if (entry.dir) continue;
+      const ext = filePath.slice(filePath.lastIndexOf('.')).toLowerCase();
+      if (ext !== '.js' && ext !== '.mjs') continue;
+      const source = filePath === root + (manifest.entrypoint as string)
+        ? code
+        : await entry.async('string');
+      const hits: string[] = [];
+      for (const { pattern, label } of SUSPICIOUS_JS_PATTERNS) {
+        if (pattern.test(source)) hits.push(label);
+        pattern.lastIndex = 0;
+      }
+      if (hits.length > 0) {
+        findings.push({ file: filePath.slice(root.length), patterns: hits });
+      }
     }
-    if (warnings.length > 0) {
+
+    const overrideWarnings = formData.get('overrideWarnings') === 'true';
+    if (findings.length > 0 && !overrideWarnings) {
+      const summary = findings
+        .map(f => `${f.file}: ${f.patterns.join(', ')}`)
+        .join('; ');
       return NextResponse.json(
-        { error: `Plugin rejected: ${warnings.join(', ')}. These patterns are not allowed for security reasons.` },
+        {
+          error: `Plugin rejected: ${summary}. Review the bundle; if these are expected `
+            + `(e.g. a vendored crypto library), re-upload with "overrideWarnings" to proceed.`,
+          findings,
+          canOverride: true,
+        },
         { status: 400 },
       );
     }
 
     const declaredFrameOrigins = sanitizeFrameOrigins(manifest.frameOrigins);
+    const declaredHttpOrigins = sanitizeHttpOrigins(manifest.httpOrigins);
+    const declaredApiPostPaths = sanitizeApiPostPaths(manifest.apiPostPaths);
 
     const now = new Date().toISOString();
     const plugin: ServerPlugin = {
@@ -166,24 +215,49 @@ export async function POST(request: NextRequest) {
       author: manifest.author as string,
       description: (manifest.description as string) || '',
       type: manifest.type as string,
+      ...(manifest.tier === 'privileged' ? { tier: 'privileged' } : {}),
       permissions: (manifest.permissions as string[]) || [],
       entrypoint: manifest.entrypoint as string,
       enabled: true,
       ...(manifest.configSchema && typeof manifest.configSchema === 'object'
         ? { configSchema: manifest.configSchema as ServerPlugin['configSchema'] }
         : {}),
+      ...(manifest.settingsSchema && typeof manifest.settingsSchema === 'object'
+        ? { settingsSchema: manifest.settingsSchema as ServerPlugin['settingsSchema'] }
+        : {}),
+      ...(manifest.locales && typeof manifest.locales === 'object'
+        ? { locales: manifest.locales as ServerPlugin['locales'] }
+        : {}),
       ...(declaredFrameOrigins.length > 0
         ? { frameOrigins: declaredFrameOrigins }
         : {}),
+      ...(declaredHttpOrigins.length > 0
+        ? { httpOrigins: declaredHttpOrigins }
+        : {}),
+      ...(declaredApiPostPaths.length > 0
+        ? { apiPostPaths: declaredApiPostPaths }
+        : {}),
       installedAt: now,
       updatedAt: now,
     };
 
     await savePlugin(plugin, code);
     invalidateFrameOriginsCache();
-    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version, frameOrigins: declaredFrameOrigins }, ip);
+    await auditLog('plugin.install', { id: plugin.id, name: plugin.name, version: plugin.version, frameOrigins: declaredFrameOrigins, httpOrigins: declaredHttpOrigins, apiPostPaths: declaredApiPostPaths }, ip);
+    if (findings.length > 0) {
+      // Record WHAT was waved through, not merely that an override happened -
+      // otherwise the audit trail can't answer "which patterns did we accept?".
+      await auditLog(
+        'plugin.install.scan_override',
+        { id: plugin.id, version: plugin.version, findings },
+        ip,
+      );
+      logger.warn('Plugin installed with scanner override', { id: plugin.id, findings });
+    }
 
-    return NextResponse.json({ plugin });
+    // Echo accepted findings back so the admin UI can confirm exactly what was
+    // waved through, rather than reporting a bare success.
+    return NextResponse.json(findings.length > 0 ? { plugin, findings } : { plugin });
   } catch (error) {
     logger.error('Plugin install error', { error: error instanceof Error ? error.message : 'Unknown error' });
     return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
@@ -196,7 +270,7 @@ export async function POST(request: NextRequest) {
  */
 export async function PATCH(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -214,9 +288,18 @@ export async function PATCH(request: NextRequest) {
     if (typeof forceEnabled === 'boolean') updates.forceEnabled = forceEnabled;
 
     const { updatePluginMeta } = await import('@/lib/admin/plugin-registry');
-    const updated = await updatePluginMeta(id, updates);
+    let updated = await updatePluginMeta(id, updates);
     if (!updated) {
-      return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+      // Dev plugins (PLUGIN_DEV_DIR) aren't in the persisted registry, but
+      // forceEnabled is canonical-stored in policy.forceEnabledPlugins on the
+      // client. Skip the registry write and return the live dev plugin so the
+      // policy save path can proceed.
+      const devEntries = await listDevPlugins();
+      const devEntry = devEntries.find(e => e.plugin.id === id);
+      if (!devEntry) {
+        return NextResponse.json({ error: 'Plugin not found' }, { status: 404 });
+      }
+      updated = { ...devEntry.plugin, ...updates };
     }
 
     // Enable/disable changes the set of plugins contributing frame origins.
@@ -238,7 +321,7 @@ export async function PATCH(request: NextRequest) {
  */
 export async function DELETE(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);

app/api/admin/policy/route.ts

@@ -26,7 +26,7 @@ export async function GET() {
  */
 export async function PUT(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);

app/api/admin/telemetry/route.ts

@@ -0,0 +1,135 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth, getClientIP } from '@/lib/admin/session';
+import { auditLog } from '@/lib/admin/audit';
+import { logger } from '@/lib/logger';
+import {
+  effectiveConsent,
+  loadState,
+  saveState,
+  buildPayload,
+  sendOnce,
+  reschedule,
+  DEFAULT_ENDPOINT,
+  getLoginCounts,
+  resolveEndpointAllowed,
+} from '@/lib/telemetry';
+
+/**
+ * GET /api/admin/telemetry
+ * Returns current consent + endpoint + next/last send + a live preview
+ * of exactly what the next heartbeat would contain.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+
+    const { consent, source, state } = await effectiveConsent();
+    const [payload, accountCounts] = await Promise.all([
+      buildPayload(),
+      getLoginCounts(),
+    ]);
+
+    return NextResponse.json(
+      {
+        consent,
+        consentSource: source,
+        endpoint: state.endpoint || DEFAULT_ENDPOINT,
+        consentedAt: state.consentedAt,
+        lastSentAt: state.lastSentAt,
+        nextScheduledAt: state.nextScheduledAt,
+        defaultEndpoint: DEFAULT_ENDPOINT,
+        payloadPreview: payload,
+        accountCounts,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (err) {
+    logger.error('telemetry GET error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/telemetry
+ * Body: { action: 'set-consent' | 'set-endpoint' | 'send-now', ... }
+ *   set-consent  : { action, consent: 'on' | 'off' }
+ *   set-endpoint : { action, endpoint: string }
+ *   send-now     : { action }
+ */
+export async function POST(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+    const ip = getClientIP(request);
+
+    const body = (await request.json().catch(() => null)) as
+      | { action?: string; consent?: string; endpoint?: string }
+      | null;
+    if (!body || typeof body.action !== 'string') {
+      return NextResponse.json({ error: 'action required' }, { status: 400 });
+    }
+
+    const { source } = await effectiveConsent();
+
+    if (body.action === 'set-consent') {
+      if (source === 'env') {
+        return NextResponse.json(
+          { error: 'consent is overridden by BULWARK_TELEMETRY env var' },
+          { status: 409 },
+        );
+      }
+      if (body.consent !== 'on' && body.consent !== 'off') {
+        return NextResponse.json({ error: 'consent must be "on" or "off"' }, { status: 400 });
+      }
+      const state = await loadState();
+      const before = state.consent;
+      state.consent = body.consent;
+      if (body.consent === 'on' && !state.consentedAt) {
+        state.consentedAt = new Date().toISOString();
+      }
+      await saveState(state);
+      await reschedule();
+      await auditLog('telemetry.set-consent', { from: before, to: body.consent }, ip);
+      return NextResponse.json({ ok: true });
+    }
+
+    if (body.action === 'set-endpoint') {
+      if (typeof body.endpoint !== 'string') {
+        return NextResponse.json({ error: 'endpoint required' }, { status: 400 });
+      }
+      const trimmed = body.endpoint.trim();
+      if (trimmed) {
+        const check = await resolveEndpointAllowed(trimmed);
+        if (!check.ok) {
+          return NextResponse.json({ error: check.reason }, { status: 400 });
+        }
+      }
+      const state = await loadState();
+      const before = state.endpoint;
+      state.endpoint = trimmed || DEFAULT_ENDPOINT;
+      await saveState(state);
+      await auditLog('telemetry.set-endpoint', { from: before, to: state.endpoint }, ip);
+      return NextResponse.json({ ok: true, endpoint: state.endpoint });
+    }
+
+    if (body.action === 'send-now') {
+      const result = await sendOnce({ reason: 'admin-manual' });
+      await auditLog(
+        'telemetry.send-now',
+        { ok: result.ok, status: result.status ?? null, error: result.error ?? null },
+        ip,
+      );
+      return NextResponse.json(result, { status: result.ok ? 200 : 502 });
+    }
+
+    return NextResponse.json({ error: 'unknown action' }, { status: 400 });
+  } catch (err) {
+    logger.error('telemetry POST error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/admin/themes/route.ts

@@ -16,9 +16,9 @@ import { sanitizeThemeCSS, validateThemeCSSSafety } from '@/lib/theme-loader';
 /**
  * GET /api/admin/themes - List all admin-managed themes
  */
-export async function GET() {
+export async function GET(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const registry = await getThemeRegistry();
@@ -36,7 +36,7 @@ export async function GET() {
  */
 export async function POST(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -156,7 +156,7 @@ export async function POST(request: NextRequest) {
  */
 export async function PATCH(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);
@@ -193,7 +193,7 @@ export async function PATCH(request: NextRequest) {
  */
 export async function DELETE(request: NextRequest) {
   try {
-    const result = await requireAdminAuth();
+    const result = await requireAdminAuth(request);
     if ('error' in result) return result.error;
 
     const ip = getClientIP(request);

app/api/admin/version/route.ts

@@ -0,0 +1,66 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAdminAuth } from '@/lib/admin/session';
+import { logger } from '@/lib/logger';
+import {
+  loadState,
+  checkOnce,
+  effectiveEndpoint,
+  disabledByEnv,
+  DEFAULT_VERSION_ENDPOINT,
+} from '@/lib/version-check';
+
+/**
+ * GET /api/admin/version
+ * Returns the cached update status, last check times, and effective config.
+ */
+export async function GET(request: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(request);
+    if ('error' in auth) return auth.error;
+
+    const state = await loadState();
+    return NextResponse.json(
+      {
+        current: process.env.NEXT_PUBLIC_APP_VERSION || '0.0.0',
+        build: process.env.NEXT_PUBLIC_GIT_COMMIT || 'unknown',
+        endpoint: effectiveEndpoint(state),
+        defaultEndpoint: DEFAULT_VERSION_ENDPOINT,
+        disabledByEnv: disabledByEnv(),
+        lastCheckedAt: state.lastCheckedAt,
+        lastSuccessAt: state.lastSuccessAt,
+        nextScheduledAt: state.nextScheduledAt,
+        status: state.status,
+      },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (err) {
+    logger.error('version admin GET error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'failed' }, { status: 500 });
+  }
+}
+
+/**
+ * POST /api/admin/version
+ * { action: 'check-now' } - force a fresh upstream fetch.
+ */
+export async function POST(req: NextRequest) {
+  try {
+    const auth = await requireAdminAuth(req);
+    if ('error' in auth) return auth.error;
+
+    const body = (await req.json().catch(() => null)) as { action?: string } | null;
+    if (!body || body.action !== 'check-now') {
+      return NextResponse.json({ error: 'unknown action' }, { status: 400 });
+    }
+
+    const result = await checkOnce({ reason: 'admin-trigger' });
+    return NextResponse.json(result);
+  } catch (err) {
+    logger.error('version admin POST error', {
+      error: err instanceof Error ? err.message : 'unknown',
+    });
+    return NextResponse.json({ error: 'failed' }, { status: 500 });
+  }
+}

app/api/auth/impersonate/route.ts

@@ -0,0 +1,142 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { encryptSession } from '@/lib/auth/crypto';
+import { sessionCookieName } from '@/lib/auth/session-cookie';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { normalizeJmapServerUrl } from '@/lib/auth/verify-jmap-auth';
+import { setStalwartAuthContextInStore } from '@/lib/stalwart/auth-context';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import {
+  ImpersonationJwtError,
+  impersonationReplayCache,
+  verifyImpersonationJwt,
+} from '@/lib/impersonation/jwt';
+import {
+  readImpersonationConfig,
+  resolveImpersonationServerUrl,
+} from '@/lib/impersonation/master-config';
+
+export const runtime = 'nodejs';
+
+const IMPERSONATION_SLOT = 0;
+
+/**
+ * Impersonation cookies deliberately omit Max-Age so the browser treats
+ * them as session cookies - the impersonated session ends when the user
+ * closes the browser, not 30 days later. Impersonation is a temporary
+ * support handoff; a normal password login is the only thing that should
+ * survive a browser restart.
+ */
+function impersonationCookieOptions() {
+  const { maxAge: _maxAge, ...rest } = getCookieOptions();
+  return rest;
+}
+
+/**
+ * GET /api/auth/impersonate?token=<jwt>
+ *
+ * Master-user impersonation via signed JWT. The token carries the target
+ * mailbox; Bulwark verifies the signature, resolves the configured Stalwart
+ * master credentials from env, then mints the same session cookies the
+ * password-login path produces. The browser is redirected to "/?impersonated=1" (see
+ * ImpersonationReconciler, GH #646) and the
+ * SPA hydrates as if the user had just logged in with master@target%master.
+ *
+ * Returns 404 when the feature is not configured so an unconfigured
+ * deployment does not advertise the endpoint.
+ */
+export async function GET(request: NextRequest) {
+  const config = readImpersonationConfig();
+  if (!config) {
+    // Not configured - behave exactly like an unknown route.
+    return new NextResponse('Not found', { status: 404 });
+  }
+
+  const token = request.nextUrl.searchParams.get('token');
+  if (!token) {
+    return NextResponse.json({ error: 'Missing token' }, { status: 400 });
+  }
+
+  let claims;
+  try {
+    claims = verifyImpersonationJwt(token, config.jwtSecret, {
+      expectedIssuer: config.expectedIssuer,
+    });
+  } catch (err) {
+    if (err instanceof ImpersonationJwtError) {
+      logger.warn('Impersonation JWT rejected', { code: err.code });
+      return NextResponse.json({ error: err.message }, { status: err.status });
+    }
+    logger.error('Impersonation JWT error', {
+      error: err instanceof Error ? err.message : 'Unknown',
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+
+  if (!impersonationReplayCache.consume(claims.jti, claims.exp)) {
+    logger.warn('Impersonation JWT replay rejected', { jti: claims.jti });
+    return NextResponse.json({ error: 'Token already used' }, { status: 401 });
+  }
+
+  const serverUrl = await resolveImpersonationServerUrl();
+  if (!serverUrl) {
+    logger.error('Impersonation requested but jmapServerUrl is not configured');
+    return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+  }
+
+  let normalizedServerUrl: string;
+  try {
+    normalizedServerUrl = normalizeJmapServerUrl(serverUrl);
+  } catch {
+    return NextResponse.json({ error: 'Invalid JMAP server URL' }, { status: 500 });
+  }
+
+  // Stalwart master-user impersonation: username = "<target>%<master>",
+  // password = <master_password>. Per Stalwart docs:
+  //   https://stalw.art/docs/auth/authorization/administrator/
+  const impersonatedUsername = `${claims.mailbox}%${config.masterUser}`;
+  const authHeader = `Basic ${Buffer.from(
+    `${impersonatedUsername}:${config.masterPassword}`,
+  ).toString('base64')}`;
+
+  const cookieStore = await cookies();
+  const sessionToken = encryptSession(
+    normalizedServerUrl,
+    impersonatedUsername,
+    config.masterPassword,
+  );
+  cookieStore.set(sessionCookieName(IMPERSONATION_SLOT), sessionToken, impersonationCookieOptions());
+  setStalwartAuthContextInStore(cookieStore, IMPERSONATION_SLOT, {
+    serverUrl: normalizedServerUrl,
+    username: impersonatedUsername,
+    authHeader,
+  });
+
+  // Structured audit log - operators rely on this for security review.
+  logger.info('Impersonation session granted', {
+    event: 'impersonation_granted',
+    jti: claims.jti,
+    mailbox: claims.mailbox,
+    tenant_id: claims.tenant_id,
+    actor_user_id: claims.actor_user_id,
+    iss: claims.iss,
+    ip:
+      request.headers.get('x-forwarded-for')?.split(',')[0]?.trim() ||
+      request.headers.get('x-real-ip') ||
+      null,
+    referer: request.headers.get('referer'),
+    user_agent: request.headers.get('user-agent'),
+  });
+
+  void recordLogin(impersonatedUsername, normalizedServerUrl);
+
+  // Use a relative Location header so the browser resolves it against the
+  // public request URL. NextResponse.redirect(new URL('/', request.url))
+  // would absolutise to the container's internal bind (http://0.0.0.0:3000)
+  // when running behind a reverse proxy that doesn't set X-Forwarded-Host.
+  return new NextResponse(null, {
+    status: 303,
+    headers: { Location: '/?impersonated=1' },
+  });
+}

app/api/auth/oauth/metadata/route.ts

@@ -0,0 +1,53 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { configManager } from '@/lib/admin/config-manager';
+import { getMetadata, getRequiredConfig } from '@/lib/oauth/token-exchange';
+
+/**
+ * Same-origin OAuth metadata (discovery) proxy.
+ *
+ * The login page needs the authorization_endpoint to build the PKCE authorize
+ * URL in the browser. Discovering it directly from the browser means a
+ * cross-origin fetch to the IdP's /.well-known/* documents, which is subject
+ * to CORS: providers like Authentik serve those documents without an
+ * Access-Control-Allow-Origin header, so the browser blocks the response and
+ * discovery fails (issue #382). Performing discovery here - server to server,
+ * where CORS does not apply - and handing the result back as a same-origin
+ * response sidesteps the problem entirely.
+ *
+ * The discovery URL is resolved from admin config (via server_id), never from
+ * client input, so this cannot be abused as an open SSRF proxy. Endpoint URLs
+ * in the discovered document are still gated by the SSRF validator inside
+ * discoverOAuth. The returned fields are public well-known metadata.
+ */
+export async function GET(request: NextRequest) {
+  await configManager.ensureLoaded();
+  const serverId = request.nextUrl.searchParams.get('server_id');
+
+  let discoveryUrl: string;
+  try {
+    ({ discoveryUrl } = getRequiredConfig(serverId));
+  } catch {
+    // OAuth not configured for this server - surface as "no metadata" rather
+    // than a 500 so the login page just hides the SSO button.
+    return NextResponse.json({ error: 'OAuth not configured' }, { status: 404 });
+  }
+
+  try {
+    const metadata = await getMetadata(serverId);
+    if (!metadata?.authorization_endpoint || !metadata.token_endpoint) {
+      logger.warn('OAuth metadata discovery returned no usable endpoints', { discoveryUrl });
+      return NextResponse.json({ error: 'OAuth discovery failed' }, { status: 502 });
+    }
+    return NextResponse.json(metadata, {
+      // Mirror the in-process discovery cache TTL so repeated login-page loads
+      // hit the CDN/browser cache instead of re-running discovery.
+      headers: { 'Cache-Control': 'private, max-age=600' },
+    });
+  } catch (error) {
+    logger.error('OAuth metadata discovery error', {
+      error: error instanceof Error ? error.message : 'Unknown error',
+    });
+    return NextResponse.json({ error: 'OAuth discovery failed' }, { status: 502 });
+  }
+}

app/api/auth/pair/create/route.ts

@@ -0,0 +1,96 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
+import { buildOAuthParams, getRequiredConfig, getTokenEndpoint } from '@/lib/oauth/token-exchange';
+import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { createPairing } from '@/lib/auth/pairing-store';
+import { hasValidPairReauth } from '@/lib/auth/pair-reauth';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
+
+// Desktop side of the cross-device QR login. The caller must be a signed-in
+// webmail session (its refresh token lives in the httpOnly jmap_rt cookie). We
+// refresh that token to (a) prove the session is live and (b) obtain a fresh
+// access token to hand the phone, then stash the bundle under a one-time
+// pairing code. The desktop renders the returned code as a QR; the phone
+// redeems it at /api/auth/pair/redeem.
+//
+// Token sharing note: the phone receives the SAME refresh token as the desktop.
+// That is correct for OAuth servers (such as Stalwart in its default config)
+// that do not rotate refresh tokens on use. If the server rotates refresh
+// tokens, the two devices would fight over the latest token — such deployments
+// should disable rotation for this client or use a token-exchange grant.
+export async function POST(request: NextRequest) {
+  const cookieStore = await cookies();
+  try {
+    // Step-up gate: minting a pairing code grants new-device access, so it
+    // requires a recent fresh IdP re-authentication (see the reauth SSO flow).
+    // The client turns this 401 into a re-auth redirect, then retries.
+    if (!(await hasValidPairReauth())) {
+      return NextResponse.json({ error: 'reauth_required' }, { status: 401 });
+    }
+
+    const body = await request.json().catch(() => ({}));
+    const slot =
+      typeof body.slot === 'number' && body.slot >= 0 && body.slot < MAX_ACCOUNT_SLOTS
+        ? body.slot
+        : 0;
+
+    const cookieName = refreshTokenCookieName(slot);
+    const refreshToken = cookieStore.get(cookieName)?.value;
+    if (!refreshToken) {
+      return NextResponse.json({ error: 'Not signed in' }, { status: 401 });
+    }
+    const serverId = cookieStore.get(refreshTokenServerCookieName(slot))?.value || null;
+
+    const tokenEndpoint = await getTokenEndpoint(serverId);
+    const params = buildOAuthParams({ grant_type: 'refresh_token', refresh_token: refreshToken }, serverId);
+
+    const tokenResponse = await fetch(tokenEndpoint, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      body: params.toString(),
+    });
+
+    if (!tokenResponse.ok) {
+      const errorText = await tokenResponse.text();
+      logger.warn('Pair create: refresh failed', { status: tokenResponse.status, error: errorText });
+      // Stale session — clear the dead cookie so the user is prompted to log
+      // back in, mirroring the token route's behaviour.
+      cookieStore.delete(cookieName);
+      cookieStore.delete(refreshTokenServerCookieName(slot));
+      return NextResponse.json({ error: 'Session expired' }, { status: 401 });
+    }
+
+    const tokens = await tokenResponse.json();
+    if (!tokens.access_token) {
+      logger.error('Pair create: refresh response missing access_token');
+      return NextResponse.json({ error: 'Invalid token response' }, { status: 502 });
+    }
+
+    // If the server rotated the refresh token, persist the new one back to the
+    // desktop's cookie so this very session keeps working. The phone will get
+    // the same (new) token below.
+    const effectiveRefreshToken = tokens.refresh_token || refreshToken;
+    if (tokens.refresh_token) {
+      cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+    }
+
+    const { clientId, serverUrl } = getRequiredConfig(serverId);
+
+    const { code, expiresIn } = createPairing({
+      accessToken: tokens.access_token,
+      refreshToken: effectiveRefreshToken,
+      expiresIn: tokens.expires_in,
+      tokenEndpoint,
+      clientId,
+      serverUrl,
+      serverId,
+    });
+
+    return NextResponse.json({ pairing_code: code, server_url: serverUrl, expires_in: expiresIn });
+  } catch (error) {
+    logger.error('Pair create error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/auth/pair/redeem/route.ts

@@ -0,0 +1,36 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { consumePairing } from '@/lib/auth/pairing-store';
+
+// Phone side of the cross-device QR login. The app POSTs the pairing code it
+// scanned; we hand back the OAuth token bundle the desktop stashed at
+// /api/auth/pair/create. The code is the only credential required — it is
+// high-entropy, single-use, and expires within ~2 minutes — so this route is
+// intentionally unauthenticated (the scanning device has no webmail cookies).
+export async function POST(request: NextRequest) {
+  try {
+    const { pairing_code: pairingCode } = await request.json().catch(() => ({}));
+    if (!pairingCode || typeof pairingCode !== 'string') {
+      return NextResponse.json({ error: 'Missing pairing code' }, { status: 400 });
+    }
+
+    const tokens = consumePairing(pairingCode);
+    if (!tokens) {
+      // Unknown, expired, or already redeemed — do not distinguish.
+      return NextResponse.json({ error: 'Invalid or expired pairing code' }, { status: 400 });
+    }
+
+    return NextResponse.json({
+      flow: 'oauth',
+      server_url: tokens.serverUrl,
+      access_token: tokens.accessToken,
+      ...(tokens.refreshToken ? { refresh_token: tokens.refreshToken } : {}),
+      ...(typeof tokens.expiresIn === 'number' ? { expires_in: tokens.expiresIn } : {}),
+      token_endpoint: tokens.tokenEndpoint,
+      client_id: tokens.clientId,
+    });
+  } catch (error) {
+    logger.error('Pair redeem error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}

app/api/auth/reauth/sso/complete/route.ts

@@ -0,0 +1,70 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import { logger } from '@/lib/logger';
+import { decryptPayload } from '@/lib/auth/crypto';
+import { exchangeCodeForTokens } from '@/lib/oauth/token-exchange';
+import { setPairReauth } from '@/lib/auth/pair-reauth';
+
+// Completes the step-up re-authentication for device pairing. The user was sent
+// to the IdP with prompt=login (see /api/auth/sso/start with purpose=reauth);
+// here we verify the returned code against the pending state and exchange it to
+// confirm a fresh login actually happened, then set the short-lived pairing
+// re-auth proof cookie. We deliberately do NOT issue a login session or write
+// any refresh-token cookies — the user is already signed in; this only proves
+// recency for the pairing action.
+
+const SSO_PENDING_COOKIE = 'sso_pending';
+const SSO_PENDING_MAX_AGE_MS = 5 * 60 * 1000;
+
+export async function POST(request: NextRequest) {
+  const cookieStore = await cookies();
+  try {
+    const { code, state } = await request.json();
+    if (!code || !state) {
+      return NextResponse.json({ error: 'Missing code or state' }, { status: 400 });
+    }
+
+    const pendingCookie = cookieStore.get(SSO_PENDING_COOKIE)?.value;
+    if (!pendingCookie) {
+      return NextResponse.json({ error: 'No pending re-auth session' }, { status: 400 });
+    }
+
+    const pending = decryptPayload(pendingCookie);
+    cookieStore.delete(SSO_PENDING_COOKIE);
+    if (!pending) {
+      return NextResponse.json({ error: 'Invalid re-auth session' }, { status: 400 });
+    }
+
+    // Only honor pending sessions that were started for the reauth purpose, so
+    // a normal login code can't be redirected into setting a pairing proof.
+    if (pending.purpose !== 'reauth') {
+      return NextResponse.json({ error: 'Not a re-auth session' }, { status: 400 });
+    }
+    if (pending.state !== state) {
+      return NextResponse.json({ error: 'State mismatch' }, { status: 400 });
+    }
+    const createdAt = pending.created_at as number;
+    if (!createdAt || Date.now() - createdAt > SSO_PENDING_MAX_AGE_MS) {
+      return NextResponse.json({ error: 'Re-auth session expired' }, { status: 400 });
+    }
+
+    const codeVerifier = pending.code_verifier as string;
+    const redirectUri = pending.redirect_uri as string;
+    const pendingServerId = typeof pending.server_id === 'string' ? pending.server_id : null;
+    if (!codeVerifier || !redirectUri) {
+      return NextResponse.json({ error: 'Invalid re-auth session data' }, { status: 400 });
+    }
+
+    // A successful exchange proves the user just authenticated at the IdP (the
+    // freshness is enforced by prompt=login on the authorize request). We don't
+    // keep the resulting tokens.
+    await exchangeCodeForTokens(code, codeVerifier, redirectUri, pendingServerId);
+
+    await setPairReauth();
+    return NextResponse.json({ ok: true });
+  } catch (error) {
+    cookieStore.delete(SSO_PENDING_COOKIE);
+    logger.error('Reauth complete error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    return NextResponse.json({ error: 'Re-authentication failed' }, { status: 401 });
+  }
+}

app/api/auth/session/route.ts

@@ -4,23 +4,34 @@ import { logger } from '@/lib/logger';
 import { encryptSession, decryptSession } from '@/lib/auth/crypto';
 import { SESSION_COOKIE_MAX_AGE, sessionCookieName } from '@/lib/auth/session-cookie';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
-import { JmapAuthVerificationError, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
+import {
+  JmapAuthVerificationError,
+  normalizeJmapServerUrl,
+  validateProxyAuthHeader,
+  verifyJmapAuth,
+} from '@/lib/auth/verify-jmap-auth';
 import {
   clearStalwartAuthContextInStore,
   setStalwartAuthContextInStore,
 } from '@/lib/stalwart/auth-context';
 import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, resolveTrustedJmapUrl } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
 
-const COOKIE_OPTIONS = {
-  ...getCookieOptions(),
-  maxAge: SESSION_COOKIE_MAX_AGE,
-};
+function sessionCookieOptions() {
+  return {
+    ...getCookieOptions(),
+    maxAge: SESSION_COOKIE_MAX_AGE,
+  };
+}
 
 function getSlot(request: NextRequest): number {
   const raw = request.nextUrl.searchParams.get('slot');
   if (raw === null) return 0;
   const slot = parseInt(raw, 10);
-  if (isNaN(slot) || slot < 0 || slot > 4) return 0;
+  if (isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS) return 0;
   return slot;
 }
 
@@ -37,19 +48,57 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
     }
 
-    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
+    // Pin the upstream URL to a configured JMAP server so an unauthenticated
+    // caller cannot point this route at internal hosts. We accept the global
+    // `jmapServerUrl` and any entry from `jmapServers`. When neither matches,
+    // we fall back to the request URL only if `allowCustomJmapEndpoint` is on
+    // - and even then the URL must resolve to a public address.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+    const trustedUrl = resolveTrustedJmapUrl(serverUrl, configuredServerUrl, serverList);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (trustedUrl) {
+      upstreamUrl = trustedUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : getSlot(request);
     const cookieName = sessionCookieName(slot);
     const authHeader = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
-    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+    // Trusted (admin-configured) URLs skip the upstream re-fetch: the cookie
+    // we write here is only ever consumed for requests on behalf of this same
+    // user, so bogus credentials would just yield 401s downstream rather than
+    // privilege escalation. Untrusted custom endpoints still verify upstream.
+    const normalizedServerUrl = upstreamTrusted
+      ? (validateProxyAuthHeader(authHeader), normalizeJmapServerUrl(upstreamUrl))
+      : await verifyJmapAuth(upstreamUrl, authHeader, { trusted: false });
     const token = encryptSession(normalizedServerUrl, username, password);
     const cookieStore = await cookies();
-    cookieStore.set(cookieName, token, COOKIE_OPTIONS);
+    cookieStore.set(cookieName, token, sessionCookieOptions());
     setStalwartAuthContextInStore(cookieStore, slot, {
       serverUrl: normalizedServerUrl,
       username,
       authHeader,
     });
 
+    void recordLogin(username, normalizedServerUrl);
+
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (error instanceof JmapAuthVerificationError) {
@@ -150,8 +199,8 @@ export async function DELETE(request: NextRequest) {
     const all = request.nextUrl.searchParams.get('all') === 'true';
 
     if (all) {
-      // Delete all session cookies (slots 0-4)
-      for (let i = 0; i <= 4; i++) {
+      // Delete all session cookies across every slot.
+      for (let i = 0; i < MAX_ACCOUNT_SLOTS; i++) {
         cookieStore.delete(sessionCookieName(i));
         clearStalwartAuthContextInStore(cookieStore, i);
       }

app/api/auth/sso/complete/route.ts

@@ -2,8 +2,12 @@ import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
 import { decryptPayload } from '@/lib/auth/crypto';
-import { exchangeCodeForTokens } from '@/lib/oauth/token-exchange';
-import { refreshTokenCookieName } from '@/lib/oauth/tokens';
+import {
+  exchangeCodeForTokens,
+  getRequiredConfig,
+  getTokenEndpoint,
+} from '@/lib/oauth/token-exchange';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
 
 const SSO_PENDING_COOKIE = 'sso_pending';
@@ -13,12 +17,18 @@ export async function POST(request: NextRequest) {
   const cookieStore = await cookies();
 
   try {
-    const { code, state } = await request.json();
+    const { code, state, slot: bodySlot } = await request.json();
 
     if (!code || !state) {
       return NextResponse.json({ error: 'Missing code or state' }, { status: 400 });
     }
 
+    // Per-account refresh-token cookie slot. Without this the route hardcoded
+    // slot 0, so the "+ Add Account" flow overwrote the first account's
+    // refresh-token cookie. Default to 0 for back-compat with any caller that
+    // omits slot. Mirrors the validation in /api/auth/token POST.
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : 0;
+
     // Read and decrypt the pending SSO cookie
     const pendingCookie = cookieStore.get(SSO_PENDING_COOKIE)?.value;
     if (!pendingCookie) {
@@ -49,6 +59,11 @@ export async function POST(request: NextRequest) {
 
     const codeVerifier = pending.code_verifier as string;
     const redirectUri = pending.redirect_uri as string;
+    const pendingServerId = typeof pending.server_id === 'string' ? pending.server_id : null;
+    const mobileRedirectUri =
+      typeof pending.mobile_redirect_uri === 'string' ? pending.mobile_redirect_uri : null;
+    const mobileState = typeof pending.mobile_state === 'string' ? pending.mobile_state : null;
+    const isMobileFlow = Boolean(mobileRedirectUri);
 
     if (!codeVerifier || !redirectUri) {
       cookieStore.delete(SSO_PENDING_COOKIE);
@@ -56,17 +71,48 @@ export async function POST(request: NextRequest) {
     }
 
     // Exchange code for tokens
-    const tokens = await exchangeCodeForTokens(code, codeVerifier, redirectUri);
+    const tokens = await exchangeCodeForTokens(code, codeVerifier, redirectUri, pendingServerId);
 
-    // Store refresh token
-    if (tokens.refresh_token) {
-      const cookieName = refreshTokenCookieName(0);
-      cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+    // For the mobile handoff flow the tokens are handed back to the app
+    // verbatim - we deliberately don't write any cookies on the webmail
+    // origin (the mobile browser tab disposes of the session after the
+    // redirect anyway, but the cookie would still get committed to the
+    // user's main webmail session if they happened to be logged in there).
+    if (!isMobileFlow) {
+      if (tokens.refresh_token) {
+        const cookieName = refreshTokenCookieName(slot);
+        cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
+      }
+      const serverCookieName = refreshTokenServerCookieName(slot);
+      if (pendingServerId) {
+        cookieStore.set(serverCookieName, pendingServerId, getCookieOptions());
+      } else {
+        cookieStore.delete(serverCookieName);
+      }
     }
 
     // Delete pending cookie
     cookieStore.delete(SSO_PENDING_COOKIE);
 
+    if (isMobileFlow) {
+      // The mobile client needs the bits it can't re-derive: the refresh
+      // token, the token endpoint it should hit to refresh later, and the
+      // client_id the IdP expects on that refresh call. The server URL is
+      // returned so the app knows which JMAP host to connect to.
+      const { clientId, serverUrl } = getRequiredConfig(pendingServerId);
+      const tokenEndpoint = await getTokenEndpoint(pendingServerId);
+      return NextResponse.json({
+        access_token: tokens.access_token,
+        expires_in: tokens.expires_in,
+        refresh_token: tokens.refresh_token,
+        token_endpoint: tokenEndpoint,
+        client_id: clientId,
+        server_url: serverUrl,
+        mobile_redirect_uri: mobileRedirectUri,
+        mobile_state: mobileState,
+      });
+    }
+
     return NextResponse.json({
       access_token: tokens.access_token,
       expires_in: tokens.expires_in,

app/api/auth/sso/start/route.ts

@@ -3,27 +3,58 @@ import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
 import { encryptPayload } from '@/lib/auth/crypto';
 import { generateCodeVerifierServer, generateCodeChallengeServer, generateStateServer } from '@/lib/oauth/pkce-server';
-import { getRequiredConfig } from '@/lib/oauth/token-exchange';
+import { getRequiredConfig, getDiscoveryValidator } from '@/lib/oauth/token-exchange';
 import { discoverOAuth } from '@/lib/oauth/discovery';
-import { OAUTH_SCOPES } from '@/lib/oauth/tokens';
+import { getOauthScopes } from '@/lib/oauth/tokens';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
-import { readFileEnv } from '@/lib/read-file-env';
+import { hasSessionSecret } from '@/lib/auth/session-secret';
+import { configManager } from '@/lib/admin/config-manager';
 
 const SSO_PENDING_COOKIE = 'sso_pending';
 const SSO_PENDING_MAX_AGE = 300; // 5 minutes
 
+// The mobile app's deep-link scheme. Only redirect targets starting with
+// this prefix may flow through the mobile handoff path; without the guard
+// the SSO complete route would be coerced into returning tokens to whatever
+// caller-controlled URL the attacker chose.
+const MOBILE_REDIRECT_SCHEME = 'bulwarkmobile://';
+
 export async function POST(request: NextRequest) {
   try {
-    if (!process.env.SESSION_SECRET && !readFileEnv(process.env.SESSION_SECRET_FILE)) {
+    if (!hasSessionSecret()) {
       return NextResponse.json({ error: 'SESSION_SECRET is required for SSO' }, { status: 500 });
     }
 
-    const { redirect_uri, locale } = await request.json();
+    const {
+      redirect_uri,
+      locale,
+      server_id: bodyServerId,
+      mobile_redirect_uri: rawMobileRedirectUri,
+      mobile_state: rawMobileState,
+      purpose: rawPurpose,
+    } = await request.json();
+
+    // `reauth` drives the step-up flow for device pairing: it forces a fresh
+    // IdP login (prompt=login) and the /reauth/sso/complete handler sets the
+    // short-lived pairing re-auth proof instead of logging the user in again.
+    const isReauth = rawPurpose === 'reauth';
 
     if (!redirect_uri || typeof redirect_uri !== 'string') {
       return NextResponse.json({ error: 'Missing redirect_uri' }, { status: 400 });
     }
 
+    const mobileRedirectUri =
+      typeof rawMobileRedirectUri === 'string' && rawMobileRedirectUri
+        ? rawMobileRedirectUri
+        : null;
+    const mobileState =
+      typeof rawMobileState === 'string' && rawMobileState ? rawMobileState : null;
+    if (mobileRedirectUri && !mobileRedirectUri.startsWith(MOBILE_REDIRECT_SCHEME)) {
+      return NextResponse.json({ error: 'Invalid mobile_redirect_uri' }, { status: 400 });
+    }
+
+    const serverId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
+
     // Validate redirect_uri origin matches the request origin to prevent open redirects
     const requestOrigin = request.headers.get('origin') || request.nextUrl.origin;
     try {
@@ -36,8 +67,8 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Invalid redirect_uri' }, { status: 400 });
     }
 
-    const { clientId, discoveryUrl } = getRequiredConfig();
-    const metadata = await discoverOAuth(discoveryUrl);
+    const { clientId, discoveryUrl } = getRequiredConfig(serverId);
+    const metadata = await discoverOAuth(discoveryUrl, { validateEndpoint: getDiscoveryValidator() });
 
     if (!metadata?.authorization_endpoint) {
       return NextResponse.json({ error: 'OAuth discovery failed' }, { status: 502 });
@@ -48,12 +79,20 @@ export async function POST(request: NextRequest) {
     const codeChallenge = generateCodeChallengeServer(codeVerifier);
     const state = generateStateServer();
 
-    // Encrypt and store in httpOnly cookie
+    // Encrypt and store in httpOnly cookie. server_id is captured here so the
+    // /complete handler reaches the same OAuth endpoint we used to authorize.
+    // Mobile params are captured here so /complete knows to return tokens to
+    // the caller (in the JSON response) instead of writing the usual server
+    // cookies - and so the callback page can redirect back to the app.
     const pendingData = {
       state,
       code_verifier: codeVerifier,
       redirect_uri,
       created_at: Date.now(),
+      ...(serverId ? { server_id: serverId } : {}),
+      ...(mobileRedirectUri ? { mobile_redirect_uri: mobileRedirectUri } : {}),
+      ...(mobileState ? { mobile_state: mobileState } : {}),
+      ...(isReauth ? { purpose: 'reauth' } : {}),
     };
 
     const encrypted = encryptPayload(pendingData);
@@ -64,12 +103,16 @@ export async function POST(request: NextRequest) {
       maxAge: SSO_PENDING_MAX_AGE,
     });
 
-    // Build authorize URL
-    const authUrl = new URL(metadata.authorization_endpoint);
+    // Build authorize URL. OAUTH_AUTHORIZE_URL, when set, overrides only the
+    // user-facing authorize endpoint (e.g. a per-brand login host). Discovery,
+    // token exchange and refresh keep using the canonical discovered endpoints.
+    const authorizeOverride =
+      configManager.get<string>('oauthAuthorizeUrl', '') || process.env.OAUTH_AUTHORIZE_URL;
+    const authUrl = new URL(authorizeOverride?.trim() || metadata.authorization_endpoint);
     authUrl.searchParams.set('response_type', 'code');
     authUrl.searchParams.set('client_id', clientId);
     authUrl.searchParams.set('redirect_uri', redirect_uri);
-    authUrl.searchParams.set('scope', OAUTH_SCOPES);
+    authUrl.searchParams.set('scope', getOauthScopes());
     authUrl.searchParams.set('state', state);
     authUrl.searchParams.set('code_challenge', codeChallenge);
     authUrl.searchParams.set('code_challenge_method', 'S256');
@@ -78,6 +121,14 @@ export async function POST(request: NextRequest) {
       authUrl.searchParams.set('ui_locales', locale);
     }
 
+    // Force a fresh credential entry for step-up re-auth. prompt=login and
+    // max_age=0 both ask the IdP to re-authenticate even if it has an active
+    // session; honoring them depends on the IdP supporting these OIDC params.
+    if (isReauth) {
+      authUrl.searchParams.set('prompt', 'login');
+      authUrl.searchParams.set('max_age', '0');
+    }
+
     return NextResponse.json({
       authorize_url: authUrl.toString(),
       state,

app/api/auth/stalwart-context/route.ts

@@ -1,10 +1,15 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
-import { JmapAuthVerificationError, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
+import { JmapAuthVerificationError, assertBasicAuthMatchesUsername, normalizeJmapServerUrl, validateProxyAuthHeader, verifyJmapAuth } from '@/lib/auth/verify-jmap-auth';
 import { setStalwartAuthContext } from '@/lib/stalwart/auth-context';
+import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, resolveTrustedJmapUrl } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
 
 function getSlot(request: NextRequest, bodySlot: unknown): number {
-  if (typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4) {
+  if (typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS) {
     return bodySlot;
   }
 
@@ -12,7 +17,7 @@ function getSlot(request: NextRequest, bodySlot: unknown): number {
   if (raw === null) return 0;
 
   const slot = parseInt(raw, 10);
-  return Number.isNaN(slot) || slot < 0 || slot > 4 ? 0 : slot;
+  return Number.isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS ? 0 : slot;
 }
 
 export async function POST(request: NextRequest) {
@@ -23,8 +28,51 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ error: 'Missing required fields' }, { status: 400 });
     }
 
+    // Pin the upstream URL to a configured JMAP server (single `jmapServerUrl`
+    // or any entry in `jmapServers`). Falls back to the request URL only when
+    // `allowCustomJmapEndpoint` is enabled, and even then it must be public.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+    const trustedUrl = resolveTrustedJmapUrl(serverUrl, configuredServerUrl, serverList);
+
+    let upstreamUrl: string;
+    let upstreamTrusted: boolean;
+    if (trustedUrl) {
+      upstreamUrl = trustedUrl;
+      upstreamTrusted = true;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        return NextResponse.json({ error: 'Server URL is not allowed' }, { status: 400 });
+      }
+      upstreamUrl = serverUrl;
+      upstreamTrusted = false;
+    } else {
+      return NextResponse.json({ error: 'JMAP server not configured' }, { status: 500 });
+    }
+
     const slot = getSlot(request, bodySlot);
-    const normalizedServerUrl = await verifyJmapAuth(serverUrl, authHeader);
+    // Trusted (admin-configured) URLs skip the upstream re-fetch, but we
+    // still bind the cookie's `username` to the credential when we can verify
+    // locally. Without this, a caller can POST username="admin@host" +
+    // authHeader=<their own Basic creds>, and downstream consumers that read
+    // the cookie-derived username (audit logs, login tracker) accept the
+    // spoof. Bearer tokens are opaque so only the format check runs;
+    // authorization sinks must key off the credential itself, not the
+    // cookie's username claim (see admin/auth's authHeader-hashed cache key).
+    let normalizedServerUrl: string;
+    if (upstreamTrusted) {
+      validateProxyAuthHeader(authHeader);
+      assertBasicAuthMatchesUsername(authHeader, username);
+      normalizedServerUrl = normalizeJmapServerUrl(upstreamUrl);
+    } else {
+      normalizedServerUrl = await verifyJmapAuth(upstreamUrl, authHeader, { trusted: false });
+    }
 
     await setStalwartAuthContext(slot, {
       serverUrl: normalizedServerUrl,
@@ -32,6 +80,8 @@ export async function POST(request: NextRequest) {
       authHeader,
     });
 
+    void recordLogin(username, normalizedServerUrl);
+
     return NextResponse.json({ ok: true });
   } catch (error) {
     if (error instanceof JmapAuthVerificationError) {

app/api/auth/token/route.ts

@@ -1,40 +1,51 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
-import { refreshTokenCookieName } from '@/lib/oauth/tokens';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
 import { exchangeCodeForTokens, buildOAuthParams, getMetadata, getTokenEndpoint } from '@/lib/oauth/token-exchange';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
 
 function getSlot(request: NextRequest): number {
   const raw = request.nextUrl.searchParams.get('slot');
   if (raw === null) return 0;
   const slot = parseInt(raw, 10);
-  if (isNaN(slot) || slot < 0 || slot > 4) return 0;
+  if (isNaN(slot) || slot < 0 || slot >= MAX_ACCOUNT_SLOTS) return 0;
   return slot;
 }
 
 export async function POST(request: NextRequest) {
   try {
-    const { code, code_verifier, redirect_uri, slot: bodySlot } = await request.json();
+    const { code, code_verifier, redirect_uri, slot: bodySlot, server_id: bodyServerId } = await request.json();
 
     if (!code || !code_verifier || !redirect_uri) {
       return NextResponse.json({ error: 'Missing required parameters' }, { status: 400 });
     }
 
-    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : getSlot(request);
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : getSlot(request);
+    const serverId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
 
-    const tokens = await exchangeCodeForTokens(code, code_verifier, redirect_uri);
+    const tokens = await exchangeCodeForTokens(code, code_verifier, redirect_uri, serverId);
 
     const response = NextResponse.json({
       access_token: tokens.access_token,
       expires_in: tokens.expires_in,
     });
 
+    const cookieStore = await cookies();
     if (tokens.refresh_token) {
       const cookieName = refreshTokenCookieName(slot);
-      const cookieStore = await cookies();
       cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
     }
+    // Persist which server entry minted this refresh token so the PUT/DELETE
+    // handlers can route the refresh/revocation calls to the right token
+    // endpoint without the client having to track it across page loads.
+    const serverCookieName = refreshTokenServerCookieName(slot);
+    if (serverId) {
+      cookieStore.set(serverCookieName, serverId, getCookieOptions());
+    } else {
+      cookieStore.delete(serverCookieName);
+    }
 
     return response;
   } catch (error) {
@@ -49,17 +60,18 @@ export async function PUT(request: NextRequest) {
     const cookieName = refreshTokenCookieName(slot);
     const cookieStore = await cookies();
     const refreshToken = cookieStore.get(cookieName)?.value;
+    const serverId = cookieStore.get(refreshTokenServerCookieName(slot))?.value || null;
 
     if (!refreshToken) {
       return NextResponse.json({ error: 'No refresh token' }, { status: 401 });
     }
 
-    const tokenEndpoint = await getTokenEndpoint();
+    const tokenEndpoint = await getTokenEndpoint(serverId);
 
     const params = buildOAuthParams({
       grant_type: 'refresh_token',
       refresh_token: refreshToken,
-    });
+    }, serverId);
 
     const tokenResponse = await fetch(tokenEndpoint, {
       method: 'POST',
@@ -70,8 +82,16 @@ export async function PUT(request: NextRequest) {
     if (!tokenResponse.ok) {
       const errorText = await tokenResponse.text();
       logger.error('Token refresh failed', { status: tokenResponse.status, error: errorText });
-      cookieStore.delete(cookieName);
-      return NextResponse.json({ error: 'Refresh failed' }, { status: 401 });
+      // Drop the refresh token only when the server definitively rejected it
+      // (invalid/expired/revoked grant). A 5xx or 429 is an outage - keeping
+      // the cookie lets the session resume once the server is back.
+      const status = tokenResponse.status;
+      if (status === 400 || status === 401 || status === 403) {
+        cookieStore.delete(cookieName);
+        cookieStore.delete(refreshTokenServerCookieName(slot));
+        return NextResponse.json({ error: 'Refresh failed' }, { status: 401 });
+      }
+      return NextResponse.json({ error: 'Token endpoint unavailable' }, { status: 503 });
     }
 
     const tokens = await tokenResponse.json();
@@ -100,17 +120,19 @@ export async function DELETE(request: NextRequest) {
     const all = request.nextUrl.searchParams.get('all') === 'true';
 
     if (all) {
-      // Revoke and delete all refresh token cookies (slots 0-4)
+      // Revoke and delete all refresh token cookies across every slot.
       const cookieStore = await cookies();
-      for (let i = 0; i <= 4; i++) {
+      for (let i = 0; i < MAX_ACCOUNT_SLOTS; i++) {
         const name = refreshTokenCookieName(i);
+        const serverCookieName = refreshTokenServerCookieName(i);
         const token = cookieStore.get(name)?.value;
+        const slotServerId = cookieStore.get(serverCookieName)?.value || null;
         if (token) {
           // Best-effort revocation
           try {
-            const metadata = await getMetadata().catch(() => null);
+            const metadata = await getMetadata(slotServerId).catch(() => null);
             if (metadata?.revocation_endpoint) {
-              const params = buildOAuthParams({ token, token_type_hint: 'refresh_token' });
+              const params = buildOAuthParams({ token, token_type_hint: 'refresh_token' }, slotServerId);
               await fetch(metadata.revocation_endpoint, {
                 method: 'POST',
                 headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
@@ -120,6 +142,7 @@ export async function DELETE(request: NextRequest) {
           } catch { /* best effort */ }
           cookieStore.delete(name);
         }
+        cookieStore.delete(serverCookieName);
       }
       return NextResponse.json({ ok: true });
     }
@@ -128,7 +151,8 @@ export async function DELETE(request: NextRequest) {
     const cookieName = refreshTokenCookieName(slot);
     const cookieStore = await cookies();
     const refreshToken = cookieStore.get(cookieName)?.value;
-    const metadata = await getMetadata().catch((err) => {
+    const slotServerId = cookieStore.get(refreshTokenServerCookieName(slot))?.value || null;
+    const metadata = await getMetadata(slotServerId).catch((err) => {
       logger.warn('Failed to discover OAuth metadata during logout', {
         error: err instanceof Error ? err.message : 'Unknown error',
       });
@@ -140,7 +164,7 @@ export async function DELETE(request: NextRequest) {
         const params = buildOAuthParams({
           token: refreshToken,
           token_type_hint: 'refresh_token',
-        });
+        }, slotServerId);
 
         try {
           const revocationResponse = await fetch(metadata.revocation_endpoint, {
@@ -158,6 +182,7 @@ export async function DELETE(request: NextRequest) {
 
       cookieStore.delete(cookieName);
     }
+    cookieStore.delete(refreshTokenServerCookieName(slot));
 
     let end_session_url: string | undefined;
     if (metadata?.end_session_endpoint) {

app/api/auth/totp-token-exchange/route.ts

@@ -1,186 +1,256 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { logger } from '@/lib/logger';
-import { discoverOAuth } from '@/lib/oauth/discovery';
-import { refreshTokenCookieName } from '@/lib/oauth/tokens';
+import { refreshTokenCookieName, refreshTokenServerCookieName } from '@/lib/oauth/tokens';
 import { getCookieOptions } from '@/lib/oauth/cookie-config';
 import { readFileEnv } from '@/lib/read-file-env';
 import { configManager } from '@/lib/admin/config-manager';
+import { isPublicHttpUrl } from '@/lib/security/url-guard';
+import { recordLogin } from '@/lib/telemetry/login-tracker';
+import { parseJmapServers, findServerByUrl, findServerById } from '@/lib/admin/jmap-servers';
+import { MAX_ACCOUNT_SLOTS } from '@/lib/account-utils';
+import { generateCodeVerifier, generateCodeChallenge } from '@/lib/oauth/pkce';
 
 /**
- * Exchange basic auth credentials (with TOTP appended) for OAuth tokens.
+ * Exchange a password + (optional) TOTP code for OAuth tokens.
  *
- * This allows 2FA users who log in with basic auth + TOTP to upgrade
- * to token-based auth, avoiding session expiry when the TOTP rotates.
+ * Stalwart 0.16+ no longer accepts the legacy `password$totp` convention over
+ * HTTP Basic auth: its Basic decoder hardcodes `mfa_token: None` and never
+ * splits the secret on `$`, so any TOTP appended to the password is verified
+ * verbatim against the password hash and fails. The MFA token must instead be
+ * supplied as a distinct field through the structured login endpoint.
  *
- * Tries three strategies:
- * 1. ROPC grant with client_id (if OAUTH_CLIENT_ID is set)
- * 2. ROPC grant without client_id
- * 3. ROPC grant authenticated via Basic Auth header (Stalwart-style)
+ * This route drives that flow server-side (avoiding browser CORS against the
+ * mail server, same as OAuth discovery):
+ *   1. POST {serverUrl}/api/auth  -> authenticate with a separate `mfaToken`,
+ *      receiving a short-lived authorization `clientCode`.
+ *   2. POST {serverUrl}/auth/token (grant_type=authorization_code) -> exchange
+ *      the code (with PKCE) for access/refresh tokens.
+ *
+ * Token-based auth also survives TOTP rotation, unlike basic auth which embeds
+ * the (≈30s) code in every request.
  */
 
-async function tryTokenRequest(
-  tokenEndpoint: string,
-  params: URLSearchParams,
-  extraHeaders?: Record<string, string>,
-): Promise<{ ok: true; tokens: { access_token: string; expires_in?: number; refresh_token?: string } } | { ok: false; status: number; error: string }> {
-  try {
-    const headers: Record<string, string> = { 'Content-Type': 'application/x-www-form-urlencoded', ...extraHeaders };
-    const response = await fetch(tokenEndpoint, {
-      method: 'POST',
-      headers,
-      body: params.toString(),
-    });
+// Fallback OAuth client id used when no client is configured. Stalwart accepts
+// any client id unless `require_client_registration` is enabled (default off);
+// when it is enabled the admin must configure `oauthClientId` with this
+// redirect URI registered.
+const DEFAULT_CLIENT_ID = 'bulwark-webmail';
 
-    if (!response.ok) {
-      const errorText = await response.text();
-      return { ok: false, status: response.status, error: errorText.substring(0, 500) };
-    }
-
-    const tokens = await response.json();
-    if (!tokens.access_token) {
-      return { ok: false, status: 502, error: 'Response missing access_token' };
-    }
-
-    return { ok: true, tokens };
-  } catch (err) {
-    return { ok: false, status: 0, error: err instanceof Error ? err.message : String(err) };
-  }
+interface LoginResult {
+  type?: string;
+  // The response keeps snake_case: only the LoginResponse variant *tags* are
+  // camelCased server-side, not the struct fields (the request fields are).
+  client_code?: string;
 }
 
-async function findTokenEndpoint(serverUrl: string): Promise<string | null> {
-  // 1. Try OAuth discovery
-  const metadata = await discoverOAuth(serverUrl);
-  if (metadata?.token_endpoint) return metadata.token_endpoint;
+function trimUrl(url: string): string {
+  return url.replace(/\/+$/, '');
+}
 
-  // 2. Try common Stalwart token endpoint paths directly
-  const candidates = [
-    `${serverUrl}/auth/token`,
-    `${serverUrl}/api/oauth/token`,
-  ];
+async function attemptLogin(
+  upstreamUrl: string,
+  username: string,
+  password: string,
+  totp: string | undefined,
+  redirectUri: string,
+  slot: number,
+  serverId: string | null,
+): Promise<NextResponse> {
+  const base = trimUrl(upstreamUrl);
 
-  for (const url of candidates) {
-    try {
-      // A POST with no body should return 400 (bad request) rather than 404 if the endpoint exists
-      const probe = await fetch(url, { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded' }, body: 'grant_type=probe' });
-      if (probe.status !== 404 && probe.status !== 405) {
-        return url;
-      }
-    } catch {
-      // Network error - endpoint not reachable
+  // Per-server OAuth credentials override the global ones when the requested
+  // server entry has its own oauth block configured.
+  const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
+  const entry = findServerById(serverList, serverId);
+  const clientId = entry?.oauth?.clientId
+    || configManager.get<string>('oauthClientId', '')
+    || process.env.OAUTH_CLIENT_ID
+    || DEFAULT_CLIENT_ID;
+  const clientSecret = entry?.oauth?.clientSecret
+    || configManager.get<string>('oauthClientSecret', '')
+    || process.env.OAUTH_CLIENT_SECRET
+    || readFileEnv(process.env.OAUTH_CLIENT_SECRET_FILE)
+    || '';
+
+  // PKCE proves the token exchange originates from the same client that
+  // initiated the login, so no client secret is required for public clients.
+  const verifier = generateCodeVerifier();
+  const challenge = await generateCodeChallenge(verifier);
+
+  // Step 1: structured login with a separate MFA token.
+  let login: LoginResult;
+  try {
+    const loginResponse = await fetch(`${base}/api/auth`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        type: 'authCode',
+        accountName: username,
+        accountSecret: password,
+        ...(totp ? { mfaToken: totp } : {}),
+        clientId,
+        redirectUri,
+        codeChallenge: challenge,
+        codeChallengeMethod: 'S256',
+      }),
+    });
+
+    if (!loginResponse.ok) {
+      const detail = (await loginResponse.text()).substring(0, 500);
+      logger.warn('TOTP login: /api/auth rejected request', { status: loginResponse.status });
+      // A 404 means the server predates the structured login endpoint; let the
+      // caller fall back to the legacy basic-auth path.
+      return NextResponse.json(
+        { error: loginResponse.status === 404 ? 'login_endpoint_missing' : 'login_failed', detail },
+        { status: loginResponse.status === 404 ? 404 : 502 },
+      );
     }
+
+    login = await loginResponse.json();
+  } catch (err) {
+    logger.warn('TOTP login: /api/auth request failed', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'login_unreachable' }, { status: 502 });
   }
 
-  return null;
+  switch (login.type) {
+    case 'authenticated':
+      break;
+    case 'mfaRequired':
+      return NextResponse.json({ error: 'totp_required' }, { status: 401 });
+    case 'failure':
+    default:
+      return NextResponse.json({ error: 'invalid_credentials' }, { status: 401 });
+  }
+
+  if (!login.client_code) {
+    logger.warn('TOTP login: authenticated response missing client_code');
+    return NextResponse.json({ error: 'login_failed' }, { status: 502 });
+  }
+
+  // Step 2: exchange the authorization code for tokens.
+  const tokenParams = new URLSearchParams({
+    grant_type: 'authorization_code',
+    code: login.client_code,
+    client_id: clientId,
+    redirect_uri: redirectUri,
+    code_verifier: verifier,
+  });
+  // Confidential clients still send their secret; harmless for public clients.
+  if (clientSecret) tokenParams.set('client_secret', clientSecret);
+
+  let tokens: { access_token?: string; expires_in?: number; refresh_token?: string };
+  try {
+    const tokenResponse = await fetch(`${base}/auth/token`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+      body: tokenParams.toString(),
+    });
+
+    if (!tokenResponse.ok) {
+      const detail = (await tokenResponse.text()).substring(0, 500);
+      logger.warn('TOTP login: token exchange failed', { status: tokenResponse.status, detail });
+      return NextResponse.json({ error: 'token_exchange_failed', detail }, { status: 502 });
+    }
+
+    tokens = await tokenResponse.json();
+  } catch (err) {
+    logger.warn('TOTP login: token endpoint failed', { error: err instanceof Error ? err.message : String(err) });
+    return NextResponse.json({ error: 'token_exchange_failed' }, { status: 502 });
+  }
+
+  if (!tokens.access_token) {
+    return NextResponse.json({ error: 'token_exchange_failed', detail: 'Response missing access_token' }, { status: 502 });
+  }
+
+  logger.info('TOTP login succeeded');
+  void recordLogin(username, base);
+  return await storeAndRespond(
+    { access_token: tokens.access_token, expires_in: tokens.expires_in, refresh_token: tokens.refresh_token },
+    slot,
+    serverId,
+  );
 }
 
 export async function POST(request: NextRequest) {
   try {
-    const { serverUrl, username, password, slot: bodySlot } = await request.json();
+    const { serverUrl, username, password, totp, slot: bodySlot, server_id: bodyServerId, redirectUri: bodyRedirectUri } =
+      await request.json();
 
     if (!serverUrl || !username || !password) {
       return NextResponse.json({ error: 'Missing required parameters' }, { status: 400 });
     }
 
-    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot <= 4 ? bodySlot : 0;
+    const slot = typeof bodySlot === 'number' && bodySlot >= 0 && bodySlot < MAX_ACCOUNT_SLOTS ? bodySlot : 0;
+    const requestedServerId = typeof bodyServerId === 'string' && bodyServerId ? bodyServerId : null;
+    const totpCode = typeof totp === 'string' && totp ? totp : undefined;
 
-    // Use the server-side JMAP_SERVER_URL if set (may differ from the
-    // public URL the browser uses, e.g. inside Docker).
-    const internalServerUrl = process.env.JMAP_SERVER_URL || process.env.NEXT_PUBLIC_JMAP_SERVER_URL || serverUrl;
+    // Pin the upstream URL to a configured JMAP server. The list of allowed
+    // servers is `jmapServerUrl` plus any entry from `jmapServers`. Only when
+    // no server is configured (and the deployment explicitly allows custom
+    // JMAP endpoints) do we fall back to the user-supplied URL - and even then
+    // it must resolve to a public address.
+    await configManager.ensureLoaded();
+    const configuredServerUrl =
+      configManager.get<string>('jmapServerUrl', '') ||
+      process.env.JMAP_SERVER_URL ||
+      process.env.NEXT_PUBLIC_JMAP_SERVER_URL ||
+      '';
+    const allowCustomEndpoint = configManager.get<boolean>('allowCustomJmapEndpoint', false);
+    const serverList = parseJmapServers(configManager.get<unknown>('jmapServers', []));
 
-    const tokenEndpoint = await findTokenEndpoint(internalServerUrl);
-    if (!tokenEndpoint) {
-      // Also try with the client-provided URL in case the internal one differs
-      const clientEndpoint = internalServerUrl !== serverUrl ? await findTokenEndpoint(serverUrl) : null;
-      if (!clientEndpoint) {
-        logger.warn('TOTP token exchange: no token endpoint found', { serverUrl, internalServerUrl });
-        return NextResponse.json({ error: 'no_token_endpoint', detail: 'Could not discover OAuth token endpoint on the mail server' }, { status: 404 });
+    let upstreamUrl: string;
+    let resolvedServerId: string | null = null;
+    const requestedEntry = findServerById(serverList, requestedServerId);
+    const matchedEntry = requestedEntry || findServerByUrl(serverList, serverUrl);
+
+    if (matchedEntry) {
+      upstreamUrl = matchedEntry.url;
+      resolvedServerId = matchedEntry.id;
+    } else if (configuredServerUrl) {
+      upstreamUrl = configuredServerUrl;
+    } else if (allowCustomEndpoint) {
+      if (!(await isPublicHttpUrl(serverUrl))) {
+        logger.warn('TOTP login: rejected non-public server URL');
+        return NextResponse.json({ error: 'invalid_server_url' }, { status: 400 });
       }
-      return await attemptAllStrategies(clientEndpoint, username, password, slot);
+      upstreamUrl = serverUrl;
+    } else {
+      return NextResponse.json({ error: 'jmap_server_not_configured' }, { status: 500 });
     }
 
-    return await attemptAllStrategies(tokenEndpoint, username, password, slot);
+    // The redirect URI must be identical in the login and token-exchange steps,
+    // and (when require_client_registration is on) registered for the client.
+    // Prefer the browser-supplied callback URL the OAuth client already uses;
+    // fall back to the upstream URL so the two steps still agree.
+    const redirectUri =
+      typeof bodyRedirectUri === 'string' && /^https?:\/\//.test(bodyRedirectUri)
+        ? bodyRedirectUri
+        : trimUrl(upstreamUrl);
+
+    return await attemptLogin(upstreamUrl, username, password, totpCode, redirectUri, slot, resolvedServerId);
   } catch (error) {
-    logger.error('TOTP token exchange error', { error: error instanceof Error ? error.message : 'Unknown error' });
+    logger.error('TOTP login error', { error: error instanceof Error ? error.message : 'Unknown error' });
     return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
   }
 }
 
-async function attemptAllStrategies(
-  tokenEndpoint: string,
-  username: string,
-  password: string,
-  slot: number,
-): Promise<NextResponse> {
-  logger.info('TOTP token exchange: found token endpoint', { tokenEndpoint });
-
-  const clientId = configManager.get<string>('oauthClientId', '') || process.env.OAUTH_CLIENT_ID;
-  const clientSecret = configManager.get<string>('oauthClientSecret', '') || process.env.OAUTH_CLIENT_SECRET || readFileEnv(process.env.OAUTH_CLIENT_SECRET_FILE);
-  const basicAuth = `Basic ${Buffer.from(`${username}:${password}`).toString('base64')}`;
-  const attempts: Array<{ strategy: string; error: string }> = [];
-
-  // Strategy 1: ROPC with client_id (if configured)
-  if (clientId) {
-    const params = new URLSearchParams({ grant_type: 'password', username, password, client_id: clientId });
-    if (clientSecret) params.set('client_secret', clientSecret);
-    const result = await tryTokenRequest(tokenEndpoint, params);
-    if (result.ok) {
-      logger.info('TOTP token exchange succeeded (ROPC with client_id)');
-      return await storeAndRespond(result.tokens, slot);
-    }
-    attempts.push({ strategy: 'ROPC with client_id', error: result.error });
-  }
-
-  // Strategy 2: ROPC without client_id
-  {
-    const params = new URLSearchParams({ grant_type: 'password', username, password });
-    const result = await tryTokenRequest(tokenEndpoint, params);
-    if (result.ok) {
-      logger.info('TOTP token exchange succeeded (ROPC without client_id)');
-      return await storeAndRespond(result.tokens, slot);
-    }
-    attempts.push({ strategy: 'ROPC without client_id', error: result.error });
-  }
-
-  // Strategy 3: Basic Auth header on token endpoint (some servers accept this)
-  {
-    const params = new URLSearchParams({ grant_type: 'password' });
-    const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
-    if (result.ok) {
-      logger.info('TOTP token exchange succeeded (Basic Auth header)');
-      return await storeAndRespond(result.tokens, slot);
-    }
-    attempts.push({ strategy: 'Basic Auth header', error: result.error });
-  }
-
-  // Strategy 4: client_credentials with Basic Auth (last resort)
-  {
-    const params = new URLSearchParams({ grant_type: 'client_credentials' });
-    const result = await tryTokenRequest(tokenEndpoint, params, { 'Authorization': basicAuth });
-    if (result.ok) {
-      logger.info('TOTP token exchange succeeded (client_credentials + Basic Auth)');
-      return await storeAndRespond(result.tokens, slot);
-    }
-    attempts.push({ strategy: 'client_credentials + Basic Auth', error: result.error });
-  }
-
-  logger.warn('TOTP token exchange: all strategies failed', { attempts });
-  return NextResponse.json({
-    error: 'token_exchange_failed',
-    detail: 'All token exchange strategies failed',
-    attempts,
-  }, { status: 502 });
-}
-
 async function storeAndRespond(
   tokens: { access_token: string; expires_in?: number; refresh_token?: string },
   slot: number,
+  serverId: string | null,
 ): Promise<NextResponse> {
+  const cookieStore = await cookies();
   if (tokens.refresh_token) {
     const cookieName = refreshTokenCookieName(slot);
-    const cookieStore = await cookies();
     cookieStore.set(cookieName, tokens.refresh_token, getCookieOptions());
   }
+  const serverCookieName = refreshTokenServerCookieName(slot);
+  if (serverId) {
+    cookieStore.set(serverCookieName, serverId, getCookieOptions());
+  } else {
+    cookieStore.delete(serverCookieName);
+  }
 
   return NextResponse.json({
     access_token: tokens.access_token,

app/api/calendar-agenda/route.ts

@@ -0,0 +1,296 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { logger } from '@/lib/logger';
+import { getStalwartCredentials } from '@/lib/stalwart/credentials';
+import { fetchJmapSession, postJmap, rebaseApiUrl } from '@/lib/stalwart/jmap-api';
+import { normalizeCalendarEventLike } from '@/lib/calendar-event-normalization';
+import { expandRecurringEvents } from '@/lib/recurrence-expansion';
+import { parseISO } from 'date-fns';
+import type { CalendarEvent } from '@/lib/jmap/types';
+
+/**
+ * POST /api/calendar-agenda
+ *
+ * Sidecar for the "Calendar Agenda" plugin. Resolves the caller's calendar
+ * account from the stored Stalwart auth context, queries upcoming
+ * CalendarEvents over JMAP, expands recurring series server-side, and returns
+ * a slim, structured-cloneable agenda the plugin can render directly.
+ *
+ * Credentials never leave the server — the sandboxed plugin only ever sees
+ * the resulting agenda DTOs.
+ *
+ * Body: { days?: number (1-90, default 7), limit?: number (1-200, default 50) }
+ */
+
+const CALENDAR_CAP = 'urn:ietf:params:jmap:calendars';
+const PRINCIPALS_CAP = 'urn:ietf:params:jmap:principals';
+
+// Mirror of lib/jmap/client.ts CALENDAR_EVENT_PROPERTIES, trimmed to what the
+// agenda actually needs (start/recurrence/display fields).
+const EVENT_PROPERTIES = [
+  'id', '@type', 'uid', 'calendarIds', 'title', 'start', 'duration', 'timeZone',
+  'showWithoutTime', 'utcStart', 'utcEnd', 'status', 'freeBusyStatus', 'color',
+  'locations', 'recurrenceId', 'recurrenceIdTimeZone', 'recurrenceRule',
+  'recurrenceOverrides', 'excludedRecurrenceRule',
+] as const;
+
+interface AgendaEvent {
+  id: string;
+  uid: string | null;
+  title: string;
+  start: string;
+  end: string;
+  allDay: boolean;
+  status: string | null;
+  color: string | null;
+  location: string | null;
+  calendarId: string | null;
+}
+
+// Pure, server-safe equivalents of lib/calendar-utils' getEventStartDate /
+// getEventEndDate. We can't import that module here because it transitively
+// pulls in a "use client" calendar component (which throws at load on the
+// server). Logic mirrors the originals.
+function parseDurationMinutes(duration: string | undefined): number {
+  if (!duration) return 0;
+  let total = 0;
+  const week = duration.match(/(\d+)W/);
+  const day = duration.match(/(\d+)D/);
+  const hour = duration.match(/(\d+)H/);
+  const min = duration.match(/(\d+)M/);
+  if (week) total += parseInt(week[1], 10) * 7 * 24 * 60;
+  if (day) total += parseInt(day[1], 10) * 24 * 60;
+  if (hour) total += parseInt(hour[1], 10) * 60;
+  if (min) total += parseInt(min[1], 10);
+  return total;
+}
+
+function eventStart(event: Partial<CalendarEvent>): Date {
+  if (!event.showWithoutTime && event.utcStart) {
+    const utc = parseISO(event.utcStart);
+    if (!isNaN(utc.getTime())) return utc;
+  }
+  return parseISO(event.start as string);
+}
+
+function eventEnd(event: Partial<CalendarEvent>): Date {
+  if (!event.showWithoutTime && event.utcEnd) {
+    const utc = parseISO(event.utcEnd);
+    if (!isNaN(utc.getTime())) return utc;
+  }
+  const start = eventStart(event);
+  if (!event.duration) return start;
+  return new Date(start.getTime() + parseDurationMinutes(event.duration) * 60000);
+}
+
+function firstLocationName(event: Partial<CalendarEvent>): string | null {
+  const locations = event.locations;
+  if (!locations || typeof locations !== 'object') return null;
+  for (const loc of Object.values(locations)) {
+    const name = (loc as { name?: unknown })?.name;
+    if (typeof name === 'string' && name.trim()) return name.trim();
+  }
+  return null;
+}
+
+function firstCalendarId(event: Partial<CalendarEvent>): string | null {
+  const ids = event.calendarIds;
+  if (!ids || typeof ids !== 'object') return null;
+  const keys = Object.keys(ids);
+  return keys.length > 0 ? keys[0] : null;
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const creds = await getStalwartCredentials(request);
+    if (!creds) {
+      return NextResponse.json({ error: 'Not authenticated' }, { status: 401 });
+    }
+
+    let body: { days?: unknown; limit?: unknown } = {};
+    try {
+      body = await request.json();
+    } catch {
+      /* empty body is fine */
+    }
+    const days = clampInt(body.days, 1, 90, 7);
+    const limit = clampInt(body.limit, 1, 200, 50);
+
+    // ── Resolve the calendar account from the JMAP session ──
+    // Hit Stalwart's canonical session endpoint on the SAME host as serverUrl.
+    // We deliberately avoid /.well-known/jmap: it 301s to the server's
+    // configured public hostname, which the host process may not be able to
+    // resolve (the browser client rewrites those URLs back to the origin for
+    // the same reason). Fall back to /.well-known/jmap for non-Stalwart servers.
+    const session = await fetchJmapSession(creds.serverUrl, creds.authHeader);
+    if (!session) {
+      return NextResponse.json({ error: 'JMAP session fetch failed' }, { status: 502 });
+    }
+    const accountId = session.primaryAccounts?.[CALENDAR_CAP];
+    if (!accountId) {
+      // No calendar account for this user — return an empty agenda, not an error.
+      return NextResponse.json({ events: [], generatedAt: new Date().toISOString() });
+    }
+
+    const using = ['urn:ietf:params:jmap:core', CALENDAR_CAP];
+    if (session.capabilities && PRINCIPALS_CAP in session.capabilities) {
+      using.push('urn:ietf:params:jmap:principals:owner');
+    }
+
+    // Send method calls to the session's apiUrl rebased onto serverUrl's host
+    // — never to session.apiUrl's (possibly unreachable) public host.
+    const apiUrl = rebaseApiUrl(session, creds.serverUrl) ?? `${creds.serverUrl}/jmap/`;
+
+    const now = new Date();
+    const horizon = new Date(now.getTime() + days * 24 * 60 * 60 * 1000);
+    // Expand from the start of today so all-day / already-running events still
+    // show in the agenda.
+    const windowStart = new Date(now);
+    windowStart.setHours(0, 0, 0, 0);
+
+    // ── 1) Query event IDs in range + load calendars (colours) ──
+    const queryReq = {
+      using,
+      methodCalls: [
+        [
+          'CalendarEvent/query',
+          {
+            accountId,
+            // Mirror the app's calendar store: an { after, before } window lets
+            // Stalwart evaluate recurrence so masters with occurrences in range
+            // are returned (a `before`-only filter can drop unbounded series).
+            filter: { after: windowStart.toISOString(), before: horizon.toISOString() },
+            limit: 1000,
+          },
+          '0',
+        ],
+        [
+          'Calendar/get',
+          { accountId, ids: null, properties: ['id', 'name', 'color'] },
+          'c',
+        ],
+      ],
+    };
+
+    const queryRes = await jmapPost(apiUrl, creds.authHeader, queryReq);
+    const queryResp = findResponse(queryRes, 'CalendarEvent/query', '0');
+    if (!queryResp) {
+      const err = findResponse(queryRes, 'error', '0');
+      return NextResponse.json(
+        { error: (err?.description as string) || 'CalendarEvent/query failed' },
+        { status: 502 },
+      );
+    }
+    const ids = (queryResp.ids as string[]) || [];
+
+    const calColors = new Map<string, { name: string; color: string | null }>();
+    const calResp = findResponse(queryRes, 'Calendar/get', 'c');
+    for (const cal of ((calResp?.list as Array<Record<string, unknown>>) || [])) {
+      if (typeof cal.id === 'string') {
+        calColors.set(cal.id, {
+          name: typeof cal.name === 'string' ? cal.name : '',
+          color: typeof cal.color === 'string' ? cal.color : null,
+        });
+      }
+    }
+
+    if (ids.length === 0) {
+      return NextResponse.json({ events: [], generatedAt: now.toISOString() });
+    }
+
+    // ── 2) Fetch full event objects (batched) ──
+    const raw: Array<Record<string, unknown>> = [];
+    const BATCH = 100;
+    for (let i = 0; i < ids.length; i += BATCH) {
+      const batch = ids.slice(i, i + BATCH);
+      const getRes = await jmapPost(apiUrl, creds.authHeader, {
+        using,
+        methodCalls: [
+          ['CalendarEvent/get', { accountId, ids: batch, properties: EVENT_PROPERTIES }, '0'],
+        ],
+      });
+      const getResp = findResponse(getRes, 'CalendarEvent/get', '0');
+      if (getResp?.list) raw.push(...(getResp.list as Array<Record<string, unknown>>));
+    }
+
+    // ── 3) Normalize + expand recurrences server-side ──
+    const normalized = raw
+      .map((e) => normalizeCalendarEventLike(e as Partial<CalendarEvent>))
+      .filter((e) => (e['@type'] ?? 'Event') === 'Event')
+      // Drop malformed events without a parseable start (would crash format()/
+      // parseISO downstream) — mirrors the calendar store guard (#316).
+      .filter((e) => typeof e.start === 'string' && e.start && !isNaN(parseISO(e.start).getTime())) as CalendarEvent[];
+
+    const expanded = expandRecurringEvents(
+      normalized,
+      windowStart.toISOString(),
+      horizon.toISOString(),
+    );
+
+    // ── 4) Keep ongoing/upcoming, sort, slice, map to DTOs ──
+    const agenda: AgendaEvent[] = expanded
+      .filter((e) => eventEnd(e).getTime() >= now.getTime())
+      .sort((a, b) => eventStart(a).getTime() - eventStart(b).getTime())
+      .slice(0, limit)
+      .map((e) => {
+        const calId = firstCalendarId(e);
+        const cal = calId ? calColors.get(calId) : undefined;
+        return {
+          id: String(e.id ?? ''),
+          uid: e.uid ?? null,
+          title: (e.title ?? '').trim() || '(no title)',
+          start: eventStart(e).toISOString(),
+          end: eventEnd(e).toISOString(),
+          allDay: !!e.showWithoutTime,
+          status: e.status ?? null,
+          color: e.color || cal?.color || null,
+          location: firstLocationName(e),
+          calendarId: calId,
+        };
+      });
+
+    return NextResponse.json({ events: agenda, generatedAt: now.toISOString() });
+  } catch (error) {
+    // `fetch failed` from undici is too generic to debug — the real reason
+    // (ENOTFOUND, ECONNREFUSED, self-signed TLS, …) lives on `error.cause`.
+    const err = error as Error & { cause?: { code?: string; message?: string } };
+    logger.error('Calendar agenda error', {
+      error: err?.message ?? 'Unknown',
+      causeCode: err?.cause?.code,
+      causeMessage: err?.cause?.message,
+    });
+    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
+  }
+}
+
+function clampInt(value: unknown, min: number, max: number, fallback: number): number {
+  const n = typeof value === 'number' ? value : Number(value);
+  if (!Number.isFinite(n)) return fallback;
+  return Math.min(max, Math.max(min, Math.round(n)));
+}
+
+async function jmapPost(
+  apiUrl: string,
+  authHeader: string,
+  payload: unknown,
+): Promise<unknown> {
+  const res = await postJmap(apiUrl, authHeader, JSON.stringify(payload));
+  if (!res.ok) {
+    throw new Error(`JMAP request failed (${res.status})`);
+  }
+  return res.json();
+}
+
+function findResponse(
+  res: unknown,
+  name: string,
+  callId: string,
+): Record<string, unknown> | null {
+  const responses = (res as { methodResponses?: unknown[] })?.methodResponses;
+  if (!Array.isArray(responses)) return null;
+  for (const entry of responses) {
+    if (Array.isArray(entry) && entry[0] === name && entry[2] === callId) {
+      return entry[1] as Record<string, unknown>;
+    }
+  }
+  return null;
+}

app/api/config/route.ts

@@ -1,7 +1,15 @@
-import { NextResponse } from 'next/server';
+import { NextRequest, NextResponse } from 'next/server';
 import { logger } from '@/lib/logger';
 import { configManager } from '@/lib/admin/config-manager';
-import { readFileEnv } from '@/lib/read-file-env';
+import { parseJmapServers, redactJmapServers } from '@/lib/admin/jmap-servers';
+import { hasSessionSecret } from '@/lib/auth/session-secret';
+import { getOauthScopes } from '@/lib/oauth/tokens';
+import {
+  matchDomainBranding,
+  parseDomainBranding,
+  pickRequestHost,
+  type BrandingOverrideKey,
+} from '@/lib/admin/domain-branding';
 
 /**
  * Runtime configuration endpoint
@@ -11,46 +19,79 @@ import { readFileEnv } from '@/lib/read-file-env';
  * post-build configuration for Docker deployments.
  *
  * Priority order:
- * 1. Admin dashboard overrides (data/admin/config.json)
- * 2. Runtime env vars (APP_NAME, JMAP_SERVER_URL)
- * 3. Build-time env vars (NEXT_PUBLIC_APP_NAME, NEXT_PUBLIC_JMAP_SERVER_URL)
- * 4. Default values
+ * 1. Per-domain branding override (admin-configured, matched on request host)
+ * 2. Admin dashboard overrides (data/admin/config.json)
+ * 3. Runtime env vars (APP_NAME, JMAP_SERVER_URL)
+ * 4. Build-time env vars (NEXT_PUBLIC_APP_NAME, NEXT_PUBLIC_JMAP_SERVER_URL)
+ * 5. Default values
  */
-export async function GET() {
+export async function GET(request: NextRequest) {
   logger.debug('Config requested');
   await configManager.ensureLoaded();
 
-  const appName = configManager.get<string>('appName') || process.env.NEXT_PUBLIC_APP_NAME || 'Webmail';
+  const host = pickRequestHost(request);
+  const domainOverrides = matchDomainBranding(
+    host,
+    parseDomainBranding(configManager.get<unknown>('domainBranding', [])),
+  );
+
+  // Per-domain override wins over the global value, but only when the
+  // entry explicitly sets that key. Otherwise we fall through to the
+  // global admin/env/default chain.
+  const branded = <T,>(key: BrandingOverrideKey, fallback: T): T => {
+    const override = domainOverrides[key];
+    if (typeof override === 'string' && override.length > 0) return override as T;
+    return configManager.get<T>(key, fallback);
+  };
+
+  const appName =
+    branded<string>('appName', '') || process.env.NEXT_PUBLIC_APP_NAME || 'Webmail';
   const jmapServerUrl = configManager.get<string>('jmapServerUrl') || process.env.NEXT_PUBLIC_JMAP_SERVER_URL || '';
   const oauthEnabled = configManager.get<boolean>('oauthEnabled', false);
   const oauthOnly = oauthEnabled && configManager.get<boolean>('oauthOnly', false);
   const stalwartFeaturesEnabled = configManager.get<boolean>('stalwartFeaturesEnabled', true);
   const allowedFrameAncestors = configManager.get<string>('allowedFrameAncestors', '');
 
-  return NextResponse.json({
-    appName,
-    jmapServerUrl,
-    oauthEnabled,
-    oauthOnly,
-    oauthClientId: configManager.get<string>('oauthClientId', ''),
-    oauthIssuerUrl: configManager.get<string>('oauthIssuerUrl', ''),
-    rememberMeEnabled: !!process.env.SESSION_SECRET || !!readFileEnv(process.env.SESSION_SECRET_FILE),
-    settingsSyncEnabled: configManager.get<boolean>('settingsSyncEnabled', false) && (!!process.env.SESSION_SECRET || !!readFileEnv(process.env.SESSION_SECRET_FILE)),
-    stalwartFeaturesEnabled,
-    devMode: configManager.get<boolean>('devMode', false),
-    faviconUrl: configManager.get<string>('faviconUrl', '/branding/Bulwark_Favicon.svg'),
-    appLogoLightUrl: configManager.get<string>('appLogoLightUrl', ''),
-    appLogoDarkUrl: configManager.get<string>('appLogoDarkUrl', ''),
-    loginLogoLightUrl: configManager.get<string>('loginLogoLightUrl', '/branding/Bulwark_Logo_Color.svg'),
-    loginLogoDarkUrl: configManager.get<string>('loginLogoDarkUrl', '/branding/Bulwark_Logo_White.svg'),
-    loginCompanyName: configManager.get<string>('loginCompanyName', ''),
-    loginImprintUrl: configManager.get<string>('loginImprintUrl', ''),
-    loginPrivacyPolicyUrl: configManager.get<string>('loginPrivacyPolicyUrl', ''),
-    loginWebsiteUrl: configManager.get<string>('loginWebsiteUrl', ''),
-    demoMode: configManager.get<boolean>('demoMode', false),
-    allowCustomJmapEndpoint: configManager.get<boolean>('allowCustomJmapEndpoint', false),
-    autoSsoEnabled: configManager.get<boolean>('autoSsoEnabled', false),
-    embeddedMode: !!allowedFrameAncestors && allowedFrameAncestors !== "'none'",
-    parentOrigin: configManager.get<string>('parentOrigin', ''),
-  });
+  return NextResponse.json(
+    {
+      appName,
+      jmapServerUrl,
+      oauthEnabled,
+      oauthOnly,
+      oauthClientId: configManager.get<string>('oauthClientId', ''),
+      oauthIssuerUrl: configManager.get<string>('oauthIssuerUrl', ''),
+      oauthScopes: getOauthScopes(),
+      rememberMeEnabled: hasSessionSecret(),
+      settingsSyncEnabled: configManager.get<boolean>('settingsSyncEnabled', false) && hasSessionSecret(),
+      stalwartFeaturesEnabled,
+      devMode: configManager.get<boolean>('devMode', false),
+      faviconUrl: branded<string>('faviconUrl', '/branding/Bulwark_Favicon.svg'),
+      appLogoLightUrl: branded<string>('appLogoLightUrl', ''),
+      appLogoDarkUrl: branded<string>('appLogoDarkUrl', ''),
+      loginLogoLightUrl: branded<string>('loginLogoLightUrl', '/branding/Bulwark_Logo_Color.svg'),
+      loginLogoDarkUrl: branded<string>('loginLogoDarkUrl', '/branding/Bulwark_Logo_White.svg'),
+      loginCompanyName: branded<string>('loginCompanyName', ''),
+      loginImprintUrl: branded<string>('loginImprintUrl', ''),
+      loginPrivacyPolicyUrl: branded<string>('loginPrivacyPolicyUrl', ''),
+      loginWebsiteUrl: branded<string>('loginWebsiteUrl', ''),
+      loginLogoMaxHeight: configManager.get<string>('loginLogoMaxHeight', ''),
+      loginLogoMaxWidth: configManager.get<string>('loginLogoMaxWidth', ''),
+      loginShowHeading: configManager.get<boolean>('loginShowHeading', true),
+      loginShowSubtitle: configManager.get<boolean>('loginShowSubtitle', true),
+      loginShowTotp: configManager.get<boolean>('loginShowTotp', true),
+      loginShowVersion: configManager.get<boolean>('loginShowVersion', true),
+      demoMode: configManager.get<boolean>('demoMode', false),
+      allowCustomJmapEndpoint: configManager.get<boolean>('allowCustomJmapEndpoint', false),
+      jmapServers: redactJmapServers(parseJmapServers(configManager.get<unknown>('jmapServers', []))),
+      jmapServerAutoPickByDomain: configManager.get<boolean>('jmapServerAutoPickByDomain', false),
+      autoSsoEnabled: configManager.get<boolean>('autoSsoEnabled', false),
+      embeddedMode: !!allowedFrameAncestors && allowedFrameAncestors !== "'none'",
+      parentOrigin: configManager.get<string>('parentOrigin', ''),
+    },
+    {
+      // Branding varies by host, so any cache between us and the browser
+      // must key its entry by the host headers we consulted.
+      headers: { Vary: 'Host, X-Forwarded-Host' },
+    },
+  );
 }

app/api/favicon/route.ts

@@ -19,6 +19,20 @@ const negativeCache = new Map<string, NegativeCacheEntry>();
 const NEGATIVE_CACHE_TTL_MS = 24 * 60 * 60 * 1000; // 1 day
 const NEGATIVE_CACHE_MAX_SIZE = 2000;
 
+// 1x1 transparent PNG. Returned with HTTP 200 (instead of 404) when no
+// favicon exists for a domain, so the browser's <img> tag loads it cleanly
+// without spamming the DevTools console with red 404 errors. Avatar.tsx
+// checks `naturalWidth <= 1` in onLoad and falls back to initials.
+const TRANSPARENT_PNG = Buffer.from(
+  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNgAAIAAAUAAen63NgAAAAASUVORK5CYII=',
+  'base64',
+);
+const MISSING_FAVICON_HEADERS = {
+  'Content-Type': 'image/png',
+  'Cache-Control': 'public, max-age=86400', // 1 day
+  'X-Bulwark-Favicon': 'missing',
+};
+
 // Strict domain validation to prevent SSRF
 const DOMAIN_RE = /^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)+$/i;
 
@@ -434,10 +448,7 @@ export async function GET(request: NextRequest) {
   // Check negative cache (domains known to have no favicon)
   const neg = negativeCache.get(normalizedDomain);
   if (neg && Date.now() - neg.fetchedAt < NEGATIVE_CACHE_TTL_MS) {
-    return new NextResponse(null, {
-      status: 404,
-      headers: { 'Cache-Control': 'public, max-age=86400' }, // 1 day
-    });
+    return new NextResponse(TRANSPARENT_PNG, { headers: MISSING_FAVICON_HEADERS });
   }
 
   // Check cache
@@ -460,10 +471,7 @@ export async function GET(request: NextRequest) {
     if (!upstream.ok) {
       evictNegativeOldest();
       negativeCache.set(normalizedDomain, { fetchedAt: Date.now() });
-      return new NextResponse(null, {
-        status: 404,
-        headers: { 'Cache-Control': 'public, max-age=86400' },
-      });
+      return new NextResponse(TRANSPARENT_PNG, { headers: MISSING_FAVICON_HEADERS });
     }
 
     const contentType = upstream.headers.get('content-type') || 'image/x-icon';
@@ -473,10 +481,7 @@ export async function GET(request: NextRequest) {
     if (data.byteLength < 10) {
       evictNegativeOldest();
       negativeCache.set(normalizedDomain, { fetchedAt: Date.now() });
-      return new NextResponse(null, {
-        status: 404,
-        headers: { 'Cache-Control': 'public, max-age=86400' },
-      });
+      return new NextResponse(TRANSPARENT_PNG, { headers: MISSING_FAVICON_HEADERS });
     }
 
     // Cache the result